It's unlimited? Really? Never new that. Damn that stuff is good though. I forgot the mention Arby's. I love their horsey sauce. In college we used to collect gobs of it and put it on everything. In tighter times we would use it on crackers, then eventually just suck it directly from the tube/packet. Y U M M Y horsey sauce!!!
Favorite fast food? Depends on what kind of mood I'm in and where I am. When in Los Angeles, Pachanga (aka City Mex) ROCKS for Mexican. Would eat there 7 days a week if i could. And there's always In and Out for burgers and fries. El Pollo is the place when I'm in the mood for chicken. In Chicago, Portillo's hits the spot for dogs or Italian beef. In Austin, there's Delaware subs and thrn Short Stop for cheap burgers and fries that have just the right amount of grease. Of the national chains, Wendys is always good.
I still go McDonald's because my kids like it, and even though the food is bad, at least it's consistently. ;-)
I'm not sure if it classifies at fast food, but Steak n' Shake has always been a big favorite. I was just thinking about it last night. My first Steak n' Shake visit and favorite one on the planet was in Webster Groves, MO, just off Rock Hill road (I think it was, across the street from Scaggs... If anyone knows where these are and what a Scaggs was.. Hell, I don't even know if that place is still there. Those were the days.