all the mods are goods
but a few mode are reputed more "skilled" and are used in official tournaments :
-aikido.tbm (and all the variants mods greykido,aikidobigdojo etc ) are the most populars and probably the most played mods in TB
-wushu (and all the variant like brushu etc...) are pretty fun and appreciate too
-there are also the family of ninjustu,rk-mma,lenshu (no grabs mod)
_and you have the spar and the run (in these mods players search a estheticall result)