Only good on my end from XP. I personally believe it depends on how you use it.

If you mess around with it, visit virus'y sites, or generally experiment, things tend to go bad. If you do the same things, over and over again, practice more security than *nixes require, don't use an administrator account (something I fail to do, I ALWAYS use admin), and don't download what you don't trust, then it won't have problems. Mind you, some computers don't like their owners and screw up on purpose. And hardware failures kill XP...

I run XP 24/7 for the past year. Not one BSOD, nor one full crash. A few app freezes, but thats ok. Fixed with a restart/ctrl+alt+del.