When you're in your car, finger-drumming on the steering wheel to whatever music is on, do you improvise variations on the rhythm? While you hum or sing along? You might be a bassist. Or a drummer...
I played guitar for years before trying bass, and I found it to be a different sort of animal. Yeah, they look similar, and have similar arrangements of notes, but the technique and approach is different. Like has been said, easy to start, but getting good takes a lot of work - like anything else.
But, much of what you learn on bass can help you with other instruments later, if you choose to branch out. A good sense of rhythm, timing, and pitch is universal.
Dive in and work at it.
And for every 20 wannabe guitar heroes, there's one bassist, so there's a better chance of finding a spot in a band.