gotta have cheese in there, and then bacon / ham is a good, mushroom ( presoftened with frylight) ... if I am making it ....
if someone else is making it then i generally dont care, so long as it fits in with the SW plan and they havent spat in it
Mushrooms are the best, I think - there is something about mushrooms and eggs which really work well together. If I have a lemon, I will grate a little bit of lemon zest into the mushrooms - delicious.
And not forgetting cheese, of course.
Actually I more often make a frittata than an omelette. I don't have a conventional cooker at the moment, but I do have a Remoska, and it is very easy to make a frittata in that.
I love having bacon, spring onions, mushrooms then tomatos and cheese on top mmmm lovely specially with tin of speghitti in tomato ssauce, also sometimes i do potato with mine and bang in some shredded chicken and make it into a foo yung just keep stiring every so often and whack a bit of soya sauce and mmmm lovely