[everforward]

Yup, this is me. I have poor impulse control, so if shopping is easy my impulses take over and I buy stuff I want but don't need.

If the place is crowded then shopping is annoying and hard, and my impulse says to get the things I need and leave. I'm more likely to leave without things I need (eh, do I really want to trudge back across the store for milk or can I just deal with black coffee?)

[morkalork]

Exactly. When a market is too busy, it just feels like your being pushed on out by the crowd.