Okay Guys Best Linux

[Sgt]

Okay Guys

Need a Bit of help, I would like to know the best linux around just now, haven't used linux in about 2 years, (Things move pretty fast in the computer world)
Been asked to convert a friends computer from that rubbish gates calls a operating system to linux (His Words)
Or make it twin boot, (easy), need linux to be able to access the windows system if I do

What I need is, ease of install, easy to setup his programs, (mostly games)
guys a games freak
He would need to be able to install the games himself (he's not computer literate)
Last time I used Linux, this was Red Hat, it was a complete pain (what's it like now)



Sgt