I main several (both bowguns, insect glaive, hammer, longsword and greatsword). But my favorites are the heavy bowgun, hammer and insect glaive. I recommend learning multiple weapons as it helps in adapting to monsters and some monsters are better suited to kill with a certain weapon type (does not mean other weapons can't kill it, but some are just better for that monster) And learn the clutch claw wall slam(clutch claw in general is really good) , it is nasty.