I've seen a few with long-winded names. One had about thirty characters in it! Mine's quite a few, but it's not like, hundred words! It's fifteen characters, which I suppose isn't bad since the word 'coloured' is quite long.
I think it's a bit pointless to have a username like x_I_heart_my_homies_so_effin_muchxXx I mean, no one will ever learn your full name really!