I frequent the drive-through at McDonald's at leat once a week, but it's not something that I would call my favorite or recommend.
I don't really eat at
any chains very often, but I guess our favorite is the Shula's
steakhouse chain, in any of its variations (Shula's 2, Shula's 347
etc.). We have dined many times at the original (before it was a chain) at the Miami Lakes Golf Club. Don Shula used to live about 500 yards away in the Loch Lomond community, and I guess he wanted a steakhouse to eat at!
I also greatly enjoyed the food at db Bistro Moderne
in downtown Miami, which is part of the Chef Daniel Boulud restaurant empire (there are db Bistro Moderne's in NYC and Singapore, too). I'd like to lunch at DBGB Kitchen
in NYC some time, and sample their house-made sausages.