Meh. A few. Get used to squeezing through Things.
I suggest building yourself as able to double as a portable wall. Use your size to tactical advantage.
Bone up on rules about spacial awareness. Squeezing, flanking, and such. players tend to 'forget' those details in tight spaces.
Straight from the Players Guide, also applicable to PCs: "Character that rely on mounts or animal companions might find Large creatures a liability in thigh underground corridors."
However, I don't think there are many tight corridors (a lot of maps are large scale, 1 square = 10 feet).