My favourite opening is Uraginimono No Requiem or something like that. It has 3 versions that adapt to whats happening in the anime and also a bit of fanservice in the most masculine no homo way of course.
Theme would be Torture Gang Dance Song which wad pretty amazing.
And my fav ending is either Last Train Home or I Want You
(Yes all of these are from JoJo, yes all i watch/read is JoJo :v)