@tsarstepan,
I find that Indian food is focused on flavour, not heat, though some Goan dishes can be very hot as a result of the Portuguese influence on the dishes.
True Mexican food can be flavourful or bland, but isn't often hot.
Tex-Mex and Mexi-Cali dishes can be brutally hot but where I run into trouble with heat is with some Vietnamese dishes. I've had a few Vietnamese meals that left me feeling like my ears were melting off the side of my head.