My hat is off to you, good sir, for becoming a vegetarian due to healthy lifestyle reasons. I cannot express how glad I am to see that it is not for animal rights reasons.
Now, I will never become a vegetarian? Why? I love meat. That's not the only reason, however. I also love fruits and veggies. I'll eat 'em all, except for the few I hate(looking at you, eggplant)
Of course, I'm not a very good person to judge by on this issue. I'm very lucky in the food world, see. Both my parents cook, and enjoy doing so, so the only times I ever eat fast food is when I go on field trips, or out with friends. I've never eaten Sonic food, for example. So I get tasty, nutricious, home-cooked meals (Having an Italian Dad is awesome), and avoid meals that are bad for me, just by living normally. When you factor in that I'm 6'5" and have some kind of mutant metabolism, as well as the fact that we raise our own beef(and pork now), things get a little unbalanced in my favor.
But I digress. Good luck with what will surely be an interesting lifestyle.