How do you guys do it?

I have played a few sngs over the years (under 1k but over 500) and enjoy them from time to time but how can some people grind out thousands a year? I have a buddy that plays thousands of PLO8 sngs a year (sharskope **TRICKE1**) and I just don't get it.

I guess my question is How can you play so much poker and always play the same exact game???

What motivates these sng machines to just keep grinding it out?

I have noticed that not all players like variety but my question is what motivates you to step up to that table again when you can play on autopliot?