Talk to any actor and they'll effuse about how awesome voice over work can be. I won't deny it: it's easy, lucrative and in high demand. I have a great story about how I was up for a part against an 11 year-old. I'll tell it to you sometime.
I always like to think there's some seedy, dark and ominous underworld to coporate videos. There may well be depeding on the corporation, but the side I've seen is a lot like a temp job. The pay is better, but there is usually a cubicle and almost always a golf shirt.