All things in moderation, including fast food. Yes, it'll kill ya, but so will alcohol, but I drink every once in a while, too.
I like 'em all - McD's, BK, Wendy's, Taco Bell, Long John Silver's, etc. And there's nothing on any of the menus that I DON'T like, breakfast, lunch or dinner.
That's about all we have around here. None of the 'lesser' places - Hardee's, Arby's, Checkers. They're around, but not in my 'normal' driving circle so hardly ever go there.
We eat fast food on average, one meal every one~two weeks.
Otherwise, it's fresh-cooked for breakfast and dinner, and leftover dinner for tomorrow's lunch.
And good for you on the healthy change! I quit taking the elevator a few years ago. My office is on the fourth floor and by the time I got to the top, it'd take 3~5 minutes before my breathing and pulse settled back down... not too good. Much better nowadays.