No, but it definitely affect how i arrange them. One thing for sure, crappy apps with ugly icons will not stay long in my touch.
Probably is the most important factor in app purchase decision. I skipped over dozens of cool app because they got shitty icons only to find out that they were actually pretty damn fun through reviews.
Icon The icon of the WoBong was so freaking funny I decide to try the game just for fun. It turned out to be a pretty fun game , plus its a 2 in 1 game pack so I lucked out. Now I look for funny looking icons for the best games!!