Top Five Tabletop RPG's

yep, this is best tabletop rpg .

First of all, I think that unless your talking about D&D 3.5 or earlier, you should just scrap #1. Wizards totally bumbled the job on 4th edition. They took a structure heavy, but still simple pen and paper game and turned it into a miniatures only game. Then they expected D&D's name to sell in waters that have long hosted sharks like Warhammer and Battlesystem. Not a chance, boys.

If your really looking for a good high fantasy game like D&D, I would suggest Pathfinder. It's still young, but it's written by some great people and they've taken great strides in preserving what Wizards threw away.

I Can see Vampire: the Masquerade, but must agree with Jocko that you can't really list Vampire as a lone system. It is the system I recommend for first time World of Darkness players, because it doesn't get so metaphysically deep as most of the other games do.

Palladium Games are pretty cool for what they are. You can't match Rifts for just crazy, badass creatures and tech. The amount of storyteller goodies in these games are ludicrous. However, the main editor, Siembieda, has maintained an iron grip on his settings. As such, he has continually ignored fan requests and insulted his own staff. He is known for throwing out whole books written for him and then taking the whole project over. Then in every foreword he complains about how he has to do everything himself. It's left some terrible broken sections in his games.

Hackmasters' I've never played, but have heard good things about it.

GURPS I've never played because It seemed overly complicated to me(Which is a problem I have with "universal" systems. They are all either super over structured, or lack any real structure at all.)

Also I'd like to recommend a game for any serious players and DMs out there. Houses of the Blooded is fairly simple, rules-wise game, that actually changes the way you look at the roll.
See, in most games you roll to see whether or not your character succeeds. In Houses, you roll to see who gets the outcome of the roll. So instead of that awesome roll meaning your character wins, it now means that you have control of what happens to your character.
Look, I know it sounds crazy at first, but check it out. It's probably the most innovative game I've seen in my lifetime.

That's my opinion anyway, not that it really counts for much. Ahhhh, such is the internet.

Gotta say, GURPS is really not a great system. It's really hard to create a system that's truly universal, and I think they tried too hard to do that. It's really kind of an annoying system in practice. Also, D & D is really overrated. If you want a better fantasy system, try Champions Turakian Age. Also also, Vampire is only one small part of the whole World of Darkness system. There's Werewolf, Mage, Hunter, Promethian, etc., there're a lot more options for gameplay than just Vampire. Another thing, you didn't mention Shadowrun. Probably the best cyberpunk RPG out there. Okay, I'm done being a nerd now.

no Call of Cthulhu? your list is lame