If you're looking for anime similar to Full Metal Panic!, you might like these titles.
When mecha attack a research center, its students, pilots, and researchers must fight back with the help of mysterious artifacts and a young samurai.
1 vote
I expect if you enjoy one you will enjoy the other.
Both are School-life/mecha anime.
Both play on the male protagonist being out of place at school, one being a samurai the other being a soldier. Both play a guardian (not in the parental sense) and partner role.
They are both pretty good anime for their category while the specific plots are different enough that you could watch them back to back.