Try a few of each type, and find the one fitting you most.

For me personally I started at $5.50, moved to the turbos $6.50, moved back to regular $5.50 and $10+1, tried some 2 table and three table Sngs and finally settled for turbo $16+1 and $25+2 single table, with an occesional $11+1 45 people Sng.

I personally like the turbos because they take much less time and they require you to play a bit looser then regular Sngs, but thats just me...

Regarding MTTs - I rarely have the required 4-5 hours to play one, so I don't