Just had the pleasure of reading some of the first few X-Men comics, retroactively titled Uncanny X-Men.
#1 X-Men
Very good start to the series. They've already set up the major players: Professor Xavier, Cyclops, Marvel Girl, Iceman, and Angel along with the evil supervillain Magneto.
I had forgotten that Beast hadn't undergone his transformation yet. He's just a little over-sized in the beginning. He can go out in public. Professor X is kind of a jerk. Maybe I'm just not used to this characterization of him, but he is a strict guy.
#2 No One Can Stop the Vanisher
This is mostly a forgettable issue, but the idea of the Vanisher is cool.
#3 Beware of the Blob
This one is silly. A giraffe actually sticks his head into Bobby's room when The Blob and the circus come to wage war on the X-Men.
#4 The Brotherhood of Evil Mutants
This one is much better than the previous two and we finally get a look at Magneto's henchman: Toad, Mastermind, Scarlet Witch, and Quicksilver. Great stuff, with a good cliffhanger.
#5 Trapped, One X-Man
Angel is kidnapped by the Brotherhood and the X-Men go to save him without the aide of Professor X.
#6 Sub-mariner Joins the Evil Mutants
I've never read a thing about Sub-mariner in my life, but he seems like an interesting character. I'll have to check him out some more. Crossovers between the titles back in the 60's happened more often than I though.
#7 The Return of the Blob
The Blob is back, and this time with a better story. The X-Men finally graduate, so the next time the Professor thinks about being with her, it won't be as creepy.
#8 The Uncanny Threat of Unus the Untouchable
Now, here's an underused villain. This guy can repel anything that's coming near him. That's a pretty cool power. They have to come up with an interesting way to stop him that I would have never thought of.
#9 Enter, The Avengers
The X-Men have to go safe Xavier from the evil Lucifer (great naming
) from the depths of somewhere not so close to Hell. Apparently this is the guy who caused Xavier to lose his legs, so I'm interested to see more about him.
Also, the Avengers show up. I don't really know much about the Avengers either. I'll have to check out some of their issues.
#10 The Coming of Ka-Zar
They don't fight mutants for once. Instead they go to Antarctica and hang out in the Savage Land with a Tarzan wannabe and his overgrown cat. Okay... I didn't really like this one although the Savage Land is cool. It does show up several times in Marvel.
#11 The Triumph of Magneto
I really liked this one too. The Stranger shows up, and he's not who I thought he was, and it sets up a very interesting ending that I can't wait to see resolved.
#12 The Origin of Professor X
Of the first dozen issues, this is the best. We get some history of Xavier and his step-brother Cain Marko / The Juggernaut while the X-Men prepare for an assault on the school. Lots of suspense in this one, something that was lacking from the previous issues.
#13 Where Walks the Juggernaut
The Juggernaut attacks the school, and the Human Torch is enlisted to help stop him. Professor X rewards him by wiping his memory for no reason. Very weird.
Also...
Tales of Suspense #49
The Iron Man story features Angel. Angel is accidentally exposed to some rays over Tony Stark's labs and becomes somewhat evil.
Strange Tales #120 The Torch Meets the Iceman
Another good crossover. Crossovers are way too much fun. I'm really starting to get into the Marvel Universe of the 60's now. In this one, there is no mutant to take of, but the duo does fight off some pirates.
Next up, the introduction of the Sentinels!
#1 X-Men
Very good start to the series. They've already set up the major players: Professor Xavier, Cyclops, Marvel Girl, Iceman, and Angel along with the evil supervillain Magneto.
I had forgotten that Beast hadn't undergone his transformation yet. He's just a little over-sized in the beginning. He can go out in public. Professor X is kind of a jerk. Maybe I'm just not used to this characterization of him, but he is a strict guy.
#2 No One Can Stop the Vanisher
This is mostly a forgettable issue, but the idea of the Vanisher is cool.
#3 Beware of the Blob
This one is silly. A giraffe actually sticks his head into Bobby's room when The Blob and the circus come to wage war on the X-Men.
#4 The Brotherhood of Evil Mutants
This one is much better than the previous two and we finally get a look at Magneto's henchman: Toad, Mastermind, Scarlet Witch, and Quicksilver. Great stuff, with a good cliffhanger.
#5 Trapped, One X-Man
Angel is kidnapped by the Brotherhood and the X-Men go to save him without the aide of Professor X.
#6 Sub-mariner Joins the Evil Mutants
I've never read a thing about Sub-mariner in my life, but he seems like an interesting character. I'll have to check him out some more. Crossovers between the titles back in the 60's happened more often than I though.
#7 The Return of the Blob
The Blob is back, and this time with a better story. The X-Men finally graduate, so the next time the Professor thinks about being with her, it won't be as creepy.
#8 The Uncanny Threat of Unus the Untouchable
Now, here's an underused villain. This guy can repel anything that's coming near him. That's a pretty cool power. They have to come up with an interesting way to stop him that I would have never thought of.
#9 Enter, The Avengers
The X-Men have to go safe Xavier from the evil Lucifer (great naming

Also, the Avengers show up. I don't really know much about the Avengers either. I'll have to check out some of their issues.
#10 The Coming of Ka-Zar
They don't fight mutants for once. Instead they go to Antarctica and hang out in the Savage Land with a Tarzan wannabe and his overgrown cat. Okay... I didn't really like this one although the Savage Land is cool. It does show up several times in Marvel.
#11 The Triumph of Magneto
I really liked this one too. The Stranger shows up, and he's not who I thought he was, and it sets up a very interesting ending that I can't wait to see resolved.
#12 The Origin of Professor X
Of the first dozen issues, this is the best. We get some history of Xavier and his step-brother Cain Marko / The Juggernaut while the X-Men prepare for an assault on the school. Lots of suspense in this one, something that was lacking from the previous issues.
#13 Where Walks the Juggernaut
The Juggernaut attacks the school, and the Human Torch is enlisted to help stop him. Professor X rewards him by wiping his memory for no reason. Very weird.
Also...
Tales of Suspense #49
The Iron Man story features Angel. Angel is accidentally exposed to some rays over Tony Stark's labs and becomes somewhat evil.
Strange Tales #120 The Torch Meets the Iceman
Another good crossover. Crossovers are way too much fun. I'm really starting to get into the Marvel Universe of the 60's now. In this one, there is no mutant to take of, but the duo does fight off some pirates.
Next up, the introduction of the Sentinels!