I think how many choices is dependent on how you sell. I do craft fairs and my booth is known for the fun of choosing from a wide variety. I usually have two booths can have 4-6 people at the booth picking up bars to compare with others. I think it is considered a fun "activity" at a fair and in the process, I have sales. I usually have 29 scents. If you sell on-line, then having a nice web site selection is needed which could probably be less. I knew a wholesaler who made only 6 scents. Also, do you want to have something for everyone or a niche? We are all different and we learn what fits you as time goes on.