You never hear those people for who it is working without problems, and they are in the majority
Personally I rather would have had only the security patches/updates instead of the all other options SP2 has added.
I've noticed that the english version of sp2 gives much more problems than eg the Dutch version. Strange but true.
A lot of problems that appears to be caused by sp2, are in fact caused by the users themselfs. Notreading instructions/manuals, setting the wrong options in applications, things like that.
Why trying to run a dos(based) application on a NT system? Doesn't normally make much sense, but people still do that.
People are still using old versions of applications, not updating their applications and such. So you can expect to run into trouble sometime.
imho sp2 is a good thing.