Not so much a Mustang guy as a car guy. Mustangs offer an inexpensive way for someone to have a car that is easily personalized and starts off with a decent bit of power and sportiness. The sky is the limit to what you can do with them and yet you don't need to feel like you're bastardizing something really nice(exotic or collector)and it's not the end of the world if you wreck it or blow it up.....fairly inexpensive to maintain.
But there are dozens of other cars I would own and drive for other reasons. Any Toyota for reliability(wish they made a pony sized car with a V8). I love my Tundra and wouldn't trade it for anything to drive on a daily basis but honestly to me trucks are more for function than fun...
If I could have anything to drive on the weekends it would be one of these.