I made a handfull of 11" x 14" darkroom prints last night. Bigger prints are cool, but I never know what to do with them.
Mostly, I print at 5x7. The smaller paper is relatively inexpensive so I don't freak out every time I waste a sheet (and I waste a lot of sheets). Smaller prints are easy to handle, display, and store.
Still, big prints are fun. I've got about 100 sheets sitting in the freezer so I might as well use them up.