Think it would be fair to say that a huge number of footballers are... well, not the most pleasant of people.
They usually aren't particularly bright, then have to handle being mini-celebrities... so it goes to their head. Twitter is a bad thing.. as it let's the supporters see the kind of people their 'heroes' really are. It was probably better in the past, when we hardly knew anything about players.
From own experience (from Weatherson 7's) - O'Ware was full of himself, he actually stood out from the rest in that way. Never rated him as a player either, so hope he'll be on his way out during the summer.