Okay guys, here's your chance! I am in possession of a 15 year old laptop. What Linux OS should I put in it?

It's been about 8 years since I gave Linux a real chance. I have an Sony VAIO PCG-3D3l Laptop which was abandoned by it's previous owner.

I have no real plans for it, except to install Linux, and if I get comfortable with it, it's probably what I will end up doing my banking on, because as much as I love Windows, I can't say I ever feel secure using Windows.

What are your recommendations? I consider myself an advanced user with most forms of technology (Have an A+ certification that's older than this laptop), but not on the level most of the people reading this are probably on.