Sicilian Opinions

I have a few questions about the Sicilian that will most likely all receive highly opinionated. Nonetheless, I'd really like to know the "general consensus" about these:

1. What's the sharpest Sicilian to play as black?

2. What's the most quiet Sicilian to play as black?

3. What's the most effective Anti-Sicilian? When I say effective, I really mean: Which Anti-Sicilian causes black the most trouble?

4. Which Sicilian is the least explored/ has the least amount of theory?

Thanks!

EDIT: Shortened the question list because it seemed daunting, and because some of them were answered by posters and further research...

haha it depends from player, but sharpest for black would be modern dragon, and for white Keres or Richter attack (just google them). As for GM level I wouldn't know since I haven't played a GM ever

Uh, I think you're missing the point of my question entirely. I'm not particularly interested in playing the Sicilian seriously (although I'm sure I'll try it). I just hear so much talk about it that I wanted to know what people thought of it. I read the wikipedia article and all, but somethings just need to be ascertained by asking the average players themselves. :)

I'll stab at answers.

1. Najdorf Poisoned Pawn
2. Kan
3. Alapin (2.c3)
4. Dragon easiest to learn. Least explored: maybe 1.e4 c5 2.Nf3 a6?!.
5. Najdorf
6. Najdorf

Ahhh... I figured the Najdorf was the most popular... Even wikipedia told me so, haha.

Hmmm...Sicilian, O'Kelly Variation (B28) . Very interesting...

this is basically a bump, but I edited the original questions...

Maybe more will reply?

1. Sharpest: Najdorf

2. Most quiet: Depends on how White plays. But in general, perhaps Accelerated Dragon?

3. Effective anti-Sicilian: tie between 2.c3 and Rossolimo (2...Nc6 3.Bb5)

4. Perhaps 2...b6, or 2...Nf6.

Hey, if Nimzowitsch could play it, then it's worth the try! It says that this variation basically goes into familiar Alekhine Defense territory... Interesting...

Just for the record, 2...b6 leads to the Katalimov Variation. I don't like the prospects of it as much, though. It looks like you're trying to pull-off the Leningrad Dutch on the opposite side...