One thing to consider is that there will be a lot of leakage of fluid, lube, etc for the first month or two... so you wear pads, which need something to attach to. Ie naked is okay in the recovery room but once you're up and about, you'll want something tight enough that a thick pad can be easily attached and held in the right place. One girl actually liked tighter undies because everything felt like it rubbed less since it was more snug. But I recall the stitches sticking out like splinters (for 3 or 4 weeks!) felt horrible snagging on anything.... ugggh!