Nothing goes on my hot dog, though my hot dog may go in a bun. None of those icky seeded or fancy ass buns, though, just a plain cheap soft bun. I see all the crap that people load up on their hot dogs and wonder why they bother with meat, since you can't possibly taste it through the piles of relishes and pickles and mustards and peppers and other such nonsense. Just skip the hot dog and put the condiments directly on a bun; it'll have fewer calories and you won't waste the money paying for the meat that you won't even taste.
Not that I have strong feelings about hot dogs and all the crap people that put on them or anything.....