This is my kinda thread. I don't even know where to start. I guess I'll go with favorite planes by era:
WWI:
The Sopwith Camel:
http://military.discovery.com/technology/vehicles/fighters/images/sopwith-camel-625x450.jpg
Sure, today it's ugly and has curves in all the wrong places, but back then it was the most beautiful thing that ever flew. Add to that an excellent performance rating and good combat record and you've got an excellent plane.
WWII:
The FW-190 "Butcher Bird"
http://warrelics.eu/forum/military_...her-bird-fw190-butcher-bird-duxford-jul09.jpg
I know, I know. You're thinking "how could you not say the Mustang!" The Mustang has enough love. Although the P-51 is pretty much perfect in terms of piloting, the FW-190 beats it in terms of being a War Machine. She was armed to the absolute teeth with more cannons and guns than most bombers, plus racks for bombs, and an optional mortar (yes, a mortar attached to the side which could be fired from the cockpit to hit bombers from below). I've flown a lot of dogfighting simulators, and nothing chews up fighters and bombers like the FW-190 in the hands of an expert. I personally managed to shoot down 200 planes in a campaign with my FW-190F. Everything else was just a toy.
Korean War:
The F-86 Sabre:
http://www.myfreewallpapers.net/vehicles/wallpapers/f-86-sabre.jpg
Speaks for itself. No words. Should have sent a poet.
Six Day War:
The Mirage 2000:
http://www.veafotoaqui.com/images/Mirage_2000D.jpg
A true example of versatility without sacrifice, the Mirage 2000 played a heavy role in Israel's astounding success in the Six Day War. Of all the modern jet aircraft in the world, she has birthed the most aces.
Vietnam War:
The F8 Crusader:
http://www.amcgltd.com/archives/images/crusader.jpg
How can you not love that frame, especially with the shark face on it? The real hero of the Vietnam war, in my opinion, and the best fighter... because it actually was one. While Phantoms were struggling with faulty missiles and NATO codes about BVR missiles, the Crusader was knocking MiGs down left and right with its cannon and heat seeking missiles. Armed with a very respectable flight envelope and afterburner, it could out perform anything in the right hands and was, according to pilots, a dream to fly; the exact opposite of its Phantom competitor. While I love how the Phantom looks and all that it did in terms of technology and tactics advancement, it was just a missile boat for all intents and purposes. The Crusader was... a crusader.
The Cold War:
The F-14 Tomcat:
http://cache.gawker.com/assets/resources/2008/05/F14.jpg
There is not a doubt in my mind that the F-14 is the greatest and most beautiful plane ever made by mankind. When the Navy asked the impossible, Grumman said "F-14." The very fact that one F-14 outperforms six F-18s, even with their more modern technology and control systems, is a real testament to its power. Phoenix missiles, over 100 nautical miles, at six targets, simultaneously, with little margin of error... nothing else has come close to that level of lethality. The F-14s only Achilles Heel was it did so much in a time when the Navy did so little. It was simple the right tool at the wrong time. We should be thankful for that, really, the whole no war with Russia thing... but I still like to imagine the F-14 would have sent everyone packing.
The Tomcat is just an inspiring piece of engineering and aviation history. I remember with bittersweet fondness the day she was retired, and History channel devoted a weekend to her entitled "Farewell to the Tomcat." I would have liked to see her fly, just one more time...