Not been gaming an awful lot lately, but here's a few of my favorites. [edit] mistakenly posted, will edit this with videos added later
Sonic games are known to have some of the best soundtracks, and Sonic 2 especially is great.
Casino Night is so groovy and awesome, gotta love it. (It's no surprise that Michael Jackson apparently helped compose music for Sonic 2.)
I recently (or rather not-so-recently, this game is taking forever to beat) picked up a JRPG called Bravely Default for my 3DS, which is essentially a spiritual successor to the classic Final Fantasies. It actually some really good pieces.
This composition individually represents each of the four main characters personalities.