I've done it a couple of times at a store, and you're right - there were quite a few young ladies wanted to sit on Santas lap
I kept every single photo that was taken (the store offered free photos with Santa) and its great to look back.
I took advantage of having the professional Santa suit to do a couple of appearances at my sons kindy (current and previous) too.
Best job in e world without a doubt - and you're right, there is absolutely no away you can be even marginally grumpy !
I thought it awesome that family friends, and even my son, failed to recognize me at all - one of e girls who worked (in IT) for me came into the store with her kids, and was gobsmacked when Santa knew their names, the names of their pets etc.