Travel back in time and check out some older anime like Gunbuster or Gunsmith Cats
Check out some anime with unique if sometimes off putting presentations like Bartender or FLAG
My favorite suggestion to make when people say they've seen it all is Kino's Journey. My personal favorite and source of the image posted.
If all this fails to interest or surprise you: try the TVTropes article Sliding Scale of Anime Obscurity.

then you a weeb enough to find your own anime