Now this is not a gaming OS! If you have games that were written for 98, the probably will not work or will work badly! If you program, you can't go wrong! It is a huge improvement over NT.
However, with all things, there are somethings that you have to do! Get the service packs and the hot fixes! Also, there are some extra stuff that gets installed such as the media player. Microsoft hid the uninstaller in the original release. IF you get Service Pack 4, it will correct that..
This is worthwhile just to get rid of BSODs and if you have a laptop running NT, you have to change over! However, XP it probably a better choice!
For games, look into XP!