I don't usually have any problems with quanity. I usually don't buy precut packages like "cakes" & "buns" and such.
The MOST important thing to me is that I can shop by designer, manufacturer or collection. By color is iffy since not everyone has the same idea of "yellow".
Make it as super, super easy as possible for your customer to find what she is looking for. I don't want to have to look through 23 pages of 12 items each just hoping I'll come across what I'm looking for. Most of the time I just leave those sites behind and move on.
Good Luck. I wish you all the best and will definitely stop by.