ok, i wasn't going to play, but a friend wore me down and i'm going to. there was another thread on it but its long and not related to my question. to you wow players

pvp or normal?
pick a server without many people right?
i hear alliance has a lot more people, is it still ok to be horde or am i gonna be screwed over?
any other tips, on what class to be/not to be, or whatever?