Inferno - Another highly regarded story from season 7. For me it suffers from being a bit overlong, but it's still a great story. Probably 4 out of 5.
I like the alternate universe stuff. It's got that standard "It's too late for our universe but maybe you can still save yours stuff" that happens in a lot of these parallel universe stories on different series. (Stargate SG-1's "There but for the Grace of God" springs immediately to mind.)
Still, you're right. It's way too long. Thus, they needed to pad it with a bunch of random monster attacks. Plus, I think it would have been more effective if they hadn't kept crosscutting back to the regular universe while the Doctor was stranded in the parallel one. It diminished the sense of the Doctor being trapped.
BTW,
When I first heard in "The Hungry Earth" that they were drilling into the Earth, I was expecting a call back to the world ending magma flows of "Inferno," not a return of the Silurians.
Horror of Fang Rock - Fairly good, but it drags a little bit. 3, maybe 3.5
It's a nice little claustrophobic horror story. But for me, I don't like that all of the guest stars die. It makes the whole thing feel like a failure, even though the Doctor successfully repels the Rutan invasion. If even just one or two of the less odious guest stars had survived, I think it would be a lot more satisfying. I also like that the Rutans are the villains here. AFAIK, this is the only time we've ever seen the Sontarans' long-time rivals.
Revelation of the Daleks - My favourite story from my favourite Doctor, and my favourite Dalek story. There's some genuine gruesomeness in there too. Not far behind Andronzani and The Silurians in my esteem, and probably the most underated DW story in my view.
This one just doesn't work for me. While it introduces a lot of interesting guest characters, none of them are as well developed as I'd like. It's also very gruesome and sometimes very confusing. (Although, if you listen to the Colin Baker Big Finish audio "Davros," you can see some of the lead up to where Davros is in this story.)
Remembrance of the Daleks - Probably my second favourite Dalek story. Very entertaining (if fanwanky), it's another genuine classic and perhaps McCoy's best story.
This is one of my favorites too. It's the 1st Sylvester McCoy story I ever saw and still one of the best. His relationship with Ace is a lot of fun here.
"Remember those explosives I told you not to bring?"
"Yeah?"
"Give them to me."
I also love an early exchange between Group Captain Gilmore (so similar to the Brigadier that even the Doctor forgets the difference) & the Doctor:
"Nothing remotely human could have possibly survived that."
"That's the point, Group Captain. The Daleks aren't even remotely human."
(I love the way McCoy rolls his "r" on "remotely.")
Carol Ann Ford fascinated me. She wasn't a particularly good actress, but she still pulled off an otherworldly mystique. A bit awkward and not especially beautiful, something about the way she carried herself really lent to the idea she wasn't human.
I think she's very beautiful, albeit in a very unusual way. But then, she reminds me a lot of a girl I know IRL. http://www.lesliewall.com/headshots.html (Kinda like a young Susan but with a narrower face, I think. I want to make a Susan fanfilm with her.)