FitzTheRuke
Legend
Taking up more space allows you to threaten more enemies -- and a 10x10 Protection Sentinel Paladin could be sweetly tanky.
DMG 278 discusses weapons for Large creatures, and it could get nasty.
Yeah, that's true, but that would only happen in that particular combination of size, class, and fighting style, and the DM doesn't need to provide large-size weapons.
I guess you're right, though. There are a few more expectations than I considered that go with being large that a player could reasonably exploit.
There are a bunch of drawbacks, too, though. Like the giant not fitting places, (or having to cross a rope-bridge!)