I also feel some times need a change of site even if do it good, is like going to the same restaurant every time for a long time, even when the food is good at some point you have the feeling to want something else, anything, just that be different please.
That's why i keep 6-8 different sites, every day can try a different one.
Even works if want to make a schedule of games, for MTT players i think no site have all the games/times that all need, usually find 2 or 3 games that like from sites, so take a couple of games from 1 site, take others from other site at different time and so on until you get your schedulle cover in times you want to play.
It works for me.
Never get borred of a site and get the games at times you want.