If I'm feeling nostalgic? Yeah, maybe. However, I have no urge to go back and play it. I hated the archaic FPS controls with no iron sights and the disgusting inaccuracy of weapons even at 100 Small Guns skill. I relied on VATS too much. I did like the game though; enough to beat it several times and put hundreds of hours into it. It's just that I totally conquered Fallout 3 and I'm still learning everything about Fallout: New Vegas. By time I get sick of New Vegas, another game will come out and I won't have time for Fallout 3.
Maybe in a year or two. I'll play it, but then I'll remember why I loved New Vegas more.