I know just how you feel! Well, maybe not just, but I've certainly become bored with anime, and I've attributed this to two things – the university's weekly anime showings which have given me a regular supply of the stuff, thus making it less special, while also leading me to realise just how much anime there is which I don't like at all, but everyone else seems to love.
Death Note is the ultimate example of this;
Higurashi no Naku Koroni and almost all involving robots are others. Reason #2 is that my 8/9-year old brother now watches subtitled anime – for a while, he regularly watched a couple of episodes a day. Though I enjoy his selections slightly more that of the anime society, it still makes it more of an everyday event and raises my standards of what is exciting.
The way I've got over it, or at least found something which can replace it, is by buying and downloading and watching far more unusual anime – specifically, the films of
Kihachiro Kawamoto and
Minna no Uta. And secondly, I now think of anime and manga as animation and comics. Though there are dramatic differences in the western and eastern industries, in the format they are normally published in, the creativity of the creators shouldn't be categorised like that… It's almost racist, for want of better word, to have separate names for one country's creations and not for others – I try to think less about countries, and more about individual creators and studios. Something non-Japanese I'd recommend in particular is
La Planète sauvage (released in the UK as
Fantastic Planet). This is a 2D animated feature film, animated not with cells but with paper cutouts – a different one for each frame of animation – which can be painted in relatively realistic, tonal, way, rather than the flat colours of cel painting. Though I like how the characters in manga and anime stand out from their backgrounds by being more stylised, I also found this refreshingly different. At least outside of short films, there's really nothing else quite like it (though
Gwen is probably the one which comes closest).