I work with Windows, Macs and Linux, each has their strengths and weaknesses. I have my own personal preference but honestly what's one mans pleasure is another mans poison.

Enjoy your MBP but do invest in the extended Applecare. Any laptop is more vulnerable to heat and drive related problems, I've never regretted extending a warranty on a laptop.

In addition to the software others have suggested you may want VLC, it plays more formats than Quicktime or WMP.