Do you prefer having a bath or a shower?
Showers. Nice and hot and usually about 5-10 minutes long. Quick and easy and very relaxing. Besides the fact that I'm really tall and can't fit very well in a bath tub... I just don't like sitting there in one. I always have soap on me still, or some other shit... bah. I hate baths, and I'm fairly sure my showers use less water.

Also, how often do you grab a bath/shower?
Daily, at least, sometimes twice. I always feel gross if I haven't gotten a shower. Every morning (unless I showered before bed) my hair and face are oily and, if it's summer, I've probably been sweating in the night at least a bit so I probably smell none too fresh.