I don't know why I just like it better than regular. No freaky arse sodas though. I remember one year my friend got me to try a candy corn flavored soda... Never again will I touch one of those.
I like citrus, lemon-lime, lemon, cola, raspberry, orange, strawberry and grape flavoured soda. Others I enjoy include ginger ale, root beer and flavoured sparkling water.
Being non-specific is best.
Last time I had some Dr. Pepper, I didn't like it at all. Was a long time ago though, so the opinion may change with another can.