I've played both. Unless you're a genious, all you do with a bass is play a few strings, IMO. However, there are some fun basslines. It's all repetition. I like guitars because you can play chords, solos, riffs, and have fun. Sure, there are TOO MANY guitar players, and if you get a bass you may have an easier way to a band -- Everyone needs a bass.
Hey, to who said bass is easier due to chords, the chords are not THAT hard, in fact, I only play chords, and I always play chords anyway. For bass, you need scales. Though a guitar is worth it.