Hard to say what my favorite class is. I like vet, psyk, arbite, and zealot. I started with vet because I really like being a simple guy who loves his gun in games that let you be wizards/mutants/whatever. I played zealot second because I love the unga bunga faith characters, I play sob on tabletop and I've played sob a few times in the ttrpg's. Then I tried psyker third and ended up really liking how they have no ammo or grenade usage and I like the bubble.

If I had to say, I think I'd say zealot. Mainly because they have the cutest voice actor imo, the scottish one.