Cheese and bacon! I get the bacon nice and crisp and break it up into pieces, mix it in with the cheese and the egg and then pour! It's delicious, and sometimes I'll dip it in Ketchup!
I had a cheese and mushroom one on a vacation once, and I'll admit it was VERY good! It was kinda creamy I noticed! I probably wouldn't pick it over my preference but if I ever came across a place where they were offered, I'd snatch one up really quickly!