Depends what you want from a Site ....
I've played online for a fair few years but lost interest following the fall out from Full Tilt, and (You Can't Be) Cereus - both with monies owed.
I've just started playing a little again and for the low stakes tourneys, with added Value and Fair Sized fields Paddy Power has 3 or 4 very good regular nightly/weekly games going, although your never going to win thousands for a few dollars - you can certainly pick up a few hundred with a little luck over a few months.
After being away from the online game for the best part of 9 Months there are two main things that I noticed at the levels I play (just from the few sites I've visited since return)
a. Unless your on Poker Stars there are almost no Low Stakes Full Ring Games around compared to 9 Months ago. I went on a Boss Site the other day and where previously I would be queing for tables at 0.5/10 and would have no trouble having 4+ tables on the go, this time I couldn't find one (in fact the dollar tables seem to have gone completely) and had to play €0.12/25 which even then only had the 1 table playing.
Maybe I logged in at the wrong time of day (it was late afternoon while I was off work the other day) but I found the same thing on the Paddy Power cash tables whilst on in the evening so I'm guessing that all the cash players have upped and gone to Pokerstars ?
b. The standard of Tournament play on the PP nightly games is definitley worse than 9 Months ago - where I thought that people would have continued improving ? - Maybe the policy of PP of integrating Sports Offers with Poker /Casino Offers is bringing along a fresh onset of Poker Players, or maybe I've improved without playing (!). The level isnt as bad as say 4 years ago but its not a whole lot better from my recent few experiences since my 9 month hiatus
Just my thoughts