I have so many favourite openings. The first Code Geass opening will forever hold a special place in my heart. The Tsuritama opening is so uplifting and energetic, I absolutely love walking to it and it always puts me in a great mood. Plus, the dance is amazing. Who doesn't love the Ennoshita Bowl dance? I am also very fond of the openings of Mawaru Penguindrum, Hellsing, Black Cat, Evangelion, Soul Eater.... The list goes on.

As for endings... I find I tend to skip them pretty often, so there aren't very many that I actually remember haha. Right now the only favourites that come to mind are the Moyashimon and Shinsekai Yori ending, but I'm sure there are more!