Friendly customer service is critical in this day and age for any retail establishment, not just cigar shops. It's why I love going into mom and pop shops and making purchases. The people there actually appreciate you walking through the door and understand the service. As far as cigar shops go, cleanliness and inventory are a close second to this. If the place looks like my basement, or has tons of empty boxes on display, I probably won't want to come back. But if I get ignored or treated rudely, I definitely won't be coming back.