Arlington
121 is horrific! Granted it's under major construction along parts of it right now, but even when completed I'll probably still try to avoid it.
360 isn't too bad. In the mornings it can be stacked up but not for long. If I were you (yes, I am a little biased!) I'd look to live in Arlington. Great town and a short and easy commute to DFW each day! Depending on where you were in Arlington, there are also many alternate routes which would mostly keep you off of 360 anyway. KGKY is a really nice airport. Enclosed T-hangars are usually available (average around $225-$275 per month) and we have a HUGE long runway- thanks to the Super Bowl Arlington hosted a few years ago. The airport was quickly remodeled due to the huge amount of Super Bowl aircraft expected. We have 6-7 RV's there that I know of, along with a Rocket. With the tower we now have, it is VERY pilot friendly. I'd MUCH prefer being based at KGKY versus Grand Prairie. The airports are only a few miles apart but Arlington is nice, modern, and very GA friendly.
Let me know if you're coming to town and I'll gladly show you around. Like most any town, there are areas where you'd really like to live, versus areas not as nice. I'll gladly give you the low down on the town.
Grapevine, Keller, and/or Southlake are all nice towns too, and really-really close to DFW. You could also get to KGKY in about 30-40 minutes from these towns. It all depends on what price range you're looking at. Nice homes and neighborhoods in all towns listed!