Why play short-handed?

[The Spy]

I think an important part in learning short-handed poker is discovering the reasons people play it. I'm come up with the following reasons for playing short-handed:

1. High volatility (potential for huge short-term gains)
2. Frequent Action (playing most hands)
3. Tilting (short-handed is the least destructive for a maniac)
4. Chance to play a horrible player (without many/any other opponents to share the money with)


I was wondering if anyone could share any other reasons one might choose to play short-handed (limit especially) as opposed to full-sized games.