I have made quite a few decisions regarding my coming trip thanks to the tips of TA and this one is no exception.
Based on what I read about restaurant prices, quality (which can be bad if in tourist locations, as some said) and probable staff attitude I decided that for my short stay I won't bother wasting time staring at restaurant menus, prices and be anxious about the kind of service I'm going to get (knowing myself I'd lose my appetite if having to deal with that).
Plus, I already eat healthy at home and our food is not so different from the French (I will however purchase good chocolate as it's hard to get here). We have a coffee/café culture too, so it's no biggie missing that...We even have the rudeness. OK, it's Paris, but still my main concern is to see the sights and explore the city.
Saying that McDonald's, Pizza Hut and the like it is...You order, you sit and you know what you're going to get. (Not to mention affordability).