Why is 6 handed poker so popular online?

[synth_floyd]

It seems that in live play usually 9 or 10 handed is the standard but online 6 handed play is more popular. Why is this? Usually I play 9/10 handed online cause I can play stronger hands which I think in theory allows for less variance. Is 6 handed play more popular cause most people are action junkies? They can use their skill advantage to play more marginal hands stronger? It's just more fun to play 6 handed?

Also, should I seriously consider learning to play 6 handed because it's more profitable? Any comments on 6 handed no limit vs. limit hold em. Thanks!