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.
It's cool that you can talk about other game sites here. At another notable site, whose name I won't mention, but which rhymes with Hoboken, you're not allowed to.
I like Jijbent.nl. They have highly talented gamers there. I'm ranked number 5 in Dipole (a game I designed), and that's artificially high. It's left over from the beginning when I was beating everyone. Now I don't have a prayer.
I'm still ranked number one at the American sites. I'll let you draw your own conclusion. Keep in mind I don't have a whole lot of game playing talent.