As with most things, it depends.
If you're in tech: Capitol Factory, and the mountains of startups here are a total plus. Austin's also growing, so you get the benefits of a larger tech hub, with somewhat lower cost of living.
If you love the outdoors: Austin is crazy hot during the summer, but there's plenty of bike paths, places to go walking, kayaking, canoeing, etc.
If you love cars: COTA is a huge plus - there's often events on the track, ranging from F1 races to chump car weekends. It's a ton of fun.
Your best bet would be to AirBnB it for a week - go to COTA, go biking, hit some meetups. I love Austin.