I prefer long run anime so that i can spent *waste* more time and i hate to see an anime end (feeling sad here, no matter wat anime is that).
Long series like 20 eps or higher.
I watched almost every genre depend mostly on the mood i would say. But my favourite is action and comedy especially mecha anime...Code geass, Gundam 00 (yeah). Except yuri anime...cant stand watching it. =.="