Do you prefer Tourny's or Cash games? I personally can never choose, because when i'm not playing either I like Cash Games better. But when i'm playing either of them I like that one better.
I find MTTs are to hard to have a decent cash in and even if you do it takes at least a few hours. I think for me it is a toss up between single table SNG's and limit cash games. I can never pull myself away from a good losing hand in NL
I prefer cash games for best pay odds---however some sites have some pretty good tourneys. poker stars has like a 30,000 for only 3.30 buy in big pay out for such little investment if you can hit it.
So far I like the cash games better the instant gratification when you win a hand most of the tourneys Ive played in I barely make it to the first pay line before the blinds eat me alive
Cash games because i'm better at 'em (currently) but i'm reading a few books on MTT strategies so after I complete those books and play some tournaments I'll be able to give my final answer.