I was just wondering if anyone is really strick with what they eat.

I have had people tell me I cant eat almost everything.
I cant eat any deli meats, hams or processed sandwich meats.
I cant eat fish,prawns, or even sushi (even cooked chicken sushi.)
I cant eat salami, twiggies, hot dogs or anything.
Cant eat cheese.

It seems a little over the top, as I really do enjoy my food, and couldnt go without a cheese and ham sandwhich, or an occasional hot dog, or twiggy salami stick.
I feel so guilty when I eat these foods, but dont think I could live off just jam sandwiches

Does anyone else out there just eat what they feel like? Or do you follow the strict regime of what to eat ?
Is it okay to eat these foods? Is it just a big 'over the top' myth?