I'm from New Zealand originally, I made a career move to the UK that kept me there for 11 years and have since lived and worked in Dubai for just over two years. Dubai is totally different from the other Gulf states. You can do everything here that is legal in most countries.
On the surface of it, it does appear to be hotels and shopping malls, like SDRider said. I hate shopping malls and I'm not too keen on hotel resorts either... But there are plenty other things to do here. It's not for everyone but if you like sunny weather almost every day of the year, swimming, surfing, bike riding, desert bashing (4x4/dirt bikes/quad bikes) and meeting new friends from all over the world, then you'll get by just fine here. There are more things to do than that, those just happen to be the main things I am into. Yes it gets faarken hot in summer, however everywhere has a/c and the out-door swimming pools are cooled. I prefer summer here to miserable, cold, wet, icy winters any day. The "winter" here is amazing. Around 22-25C every day from November through March. It's about to start warming up any time soon now though.
I hope you get to discover some of those things while you're here. You'll see there are two very decent tracks here as well. Yas Marina (F1 track) and Dubai Autodrome, also an FIA spec circuit. Both host frequent track days.
You're welcome to pm me if you want to chat or meet.