Xenon lights is a must!!!
I don't understand why Ford still makes Mustangs with those candle light...you can't see anything with halogen...and it looks so ugly...I prefer projector style xenons.
leather, well I have leather in 3 out of 4 cars that I had and love it. Yes, it heats up during summer, that' why I don't have black leather...
Intelligent key/keyless go/engine start is also very nice, but I would say not very necessary. I like that Acura had that standard, I'd have to pay $1-1.5k on other makes for this option.
Voice recongition is also very nice option, along with Bluetooth phone hook-up...you can finally hear, no matter how loud it is outside...
navigation system is not a must on a daily driver, unless your job requires travelling, but still should be fitted on a family/weekend car. you will find it very usefull when going to another city/state. I would never go to San Francisco without it.
Sunroof is a must for me! Just like power windows! All my cars have a sunroof.
Heated steering wheel - never had that option...
Heated seats - if your interior is leather, consider this option, you won't regret it when it's cold.
Head up display - never had it.
back up camera - a must for SUV!
I wish more and more luxury cars would offer
air suspension! I love it on the S-class, but that car is so expensive!