One of the most useful techniques in the NES Gauntlet port is shooting through the gaps in some of the walls to clear out a bunch of baddies in total safety before rounding a corner.

Unless you pick the Warrior. He's got the strongest weapon, true, but he's slow, and when he tries to shoot through the corners

He totally can't, his shots are too large.

Making the Warrior almost completely useless, so I wouldn't bother picking him... unless you want to make the game harder on yourself for some reason.