Are you sincerely making those recommendations? Those are probably the worst recommendations for default multimedia players. VLC is an ok fallback player since it can play most anything, but on any given releases there are known problems with various codecs as far as artifacting of broken features of the container / Codec are concerned. There are muck better video players. Also while ITunes on OS X may be decent, it is a sluggish, crash-prone memory hog on windows (I swear apple releases it broken on windows in order to convince people with IPhones to switch to OS X)...
I guess I don't know that much about them... But, I do personally like them, and would recommend them, but I guess not strongly
I mean, I think iTunes is alright: It does what I want, and it doesn't really interfere with anything. And, so far, VLC has done everything I've needed it to do, although (but this might have just been me) the last time I tried its file conversion tool it didn't do anything, :S
Anyway, rephrase: I recommend these media players, but not strongly.