I always, always put french fries in my burgers when I happen to have fast food. Its soo good. I have done it ever since i went to new mexico and there was a bite out of my burger patty. I opened up the bun to put french fries in, and a chunk was missing, and there were teeth marks in it... so yeah, everytime now.
I also put ketchup on my soft pretzel, people tell me its gross, but it really isn't. Plus I hate mustard.
Oh yeah, and meat needs to be totally cooked. Nothing grosses me out more then meat that is like mushy and kinda raw. I love turkey and chicken that people say is 'too dry'.