What brand and weight of oil are you using?
It really depends on your driving style and the type of oil used. Most modern oils are totally fine with extended drain intervals. If you typically do a lot of short trip driving you should change it more often. Older fuel injected cars tend to run very rich on cold start. Repeated short trips (especially in cold weather) will cause fuel to build up in the oil and moisture to accumulate in the crankcase.
All that being said... Oil is the life blood of your engine. It won't hurt anything to change it more often. Just make sure you take the engine oil and filter to an appropriate recycling center.