I really like the sound of a motor spiinning up when you plug in the charger, Nokia got it right. The other sounds are pretty innocuous and not remarkable. I smile when I plug in the charger though.

The battery icons you guys are doing are more than cosmetic. Nokia goofed on these. They are not informative. Your phone can be in the 30% range and the batt level looks like it's over 50%. So I would say you guys are adding "beautiful' functionality!