I will go against the majority here and say, that if you are relatively new to poker, then its best to focus on one or maybe two sites. For starters its not great to have your bankroll spread out over say 5 sites, because then it either need to be 5 times as large, or you will have trouble and expenses moving money around, whenever you run bad on a site. If for instance you only want to set aside 100$ for your starting bankroll, then I would certainly keep it all on the same site and only play there, until I had grinded it up to something big enough to split in two, or I simply want to try another site.
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