Is it just me, or does the music you create always sound good only to your own ears?

I'm lazy and not particularly creatively inclined. I can only play the piano because my coordination is pretty good. But do not ask me to perform with emotion or compose something, cos' it'll turn out crap.

So my (dying) hobby is requesting for song sheets on Pianofiles.com and sightreading them, singing along. But never, NEVER, NEVER practising. I therefore have zero songs I can play to you from memory, except maybe the beginning of Fur Elise, and Mary Had A Little Lamb.

To me, I can hear perfectly well what song I'm playing (in relation to the real song) and I imagine I may even be fairly enjoyable to listen to. (Assuming I hit the right notes and keep the right tempo.) But Mom always blows my bubble.

'Why always the same song.'
'I can't even tell what song you're playing.'
'You sure this is Shakira? Cannot be lah. Doesn't sound like it also.'

Thanks Mom. And Happy Mother's Day.