Please keep things positive. Best advise I believe is to try out different sites. Find what works well for you. If you don't like it, don't go back and try another site. Nothing says you only have to play on 1 site. At one time, I played on about 6 different turn-based game sites.
MadMonkey: I don't visit yourturnmyturn as much as I use to (once Dice Poker & Logic where brought here), but I did find your invite and accepted it. I still have my paid membership there, but I found that so few people are on the site - the games with the same people started to get a little boring.
Now if you want a challenge - try http://www.jijbent.nl - which is the dutch language sister site of YourTurnMyTurn - and very popular (of Dutch speaking people). I don't understand a thing, but I did manage to get into a few games & tournaments and found there was a lot more of a challenge in the logic game on the Dutch site then the English site.