1. The miners simplicity and efficiency are unrivaled. Seriously, nothing comes close.
2. The high risk, high gain has benefited me very well over the past year leaving me, on average, with higher profit over time.
For a third reason, Dr. Haribo, the owner and operator, is simply the best. He is constantly working towards a better Bitminter for us and charger nothing in return. Over the past year I've watched this pool grow and because of Dr. Haribo's willingness to listen to users and his skill, the pool has simply become the best out there for most miners.
With all of that said, if you can only mine for a few hours a day then a PPS pool might be better for short term profits.
I was thinking about this over dinner. How does pool hopping hurt anyone? if it takes 1,000,000 shares to get a block and someone jumps in at the end and contributes 25 shares before the block is found and they are rewarded based on 25/1,000,000. What is the problem with this and why do such drastic measures need to be taken to prevent it?