Panera has some good breadbowls. Their broccoli cheese is awesome.
Though I don't hate mayo based things, like ranch dressing, mayo all by itself is nasty. Seriously. Egg whites, oil, and lemon juice/vinegar to bleach it out? Ew. And it looks nasty, especially when people put on too much and it oozes from their sandwich. Gross.
Personally my favorite dressing on salads is Italian. I'm really picky about what kinds, because I like them to have flavor and not just taste like oil and vinegar.