400+ hours into New Vegas isn't as much as it sounds, especially if you take your time and manage your inventory and skills properly and don't cheat at all. My dad spent six months on Baldur's Gate 1 alone. 800 hours into Planescape, though, bewilders me a bit.
I fully expect to place 100+ hours into Original Sin. I sure put my fair share of hours into Divine Divinity 1.
