My favourite manga which I somehow ama little bit ashamed of is and will probably ever be OnePiece. Each weaks release is a new highlight for me, it can make me laughe, cry (lol not rly ^^) or just feel and experience the feeling of pure awesomeness that Oda creates. Also OnePiece doesn't tend to get boring even after it's 500 chapers I still can't wait for the next release.
My favourite anime on the other hand is "Mushishi" when I first red about that Anime I thought it'd be lame, boring and crazy but I'm quite the curious one so I still watched the first episode and in but a few minutes the Anime had me faszinated and trapped in it's amazing world. I could never get enoughe of it and still now when I want to have a calm evening I cook something for myself and then watch Mushishi.