I've been thinking about similar things recently, but not quite the same.
I have been a full ring grinder for years. It hasn't been so enjoyable since the whole full tilt problem mainly because it's a dying game since full tilt as ft had way the most fish/best games nitty games on pokerstars arn't fun.
Thais left me wanting to find a new game to play but the problem i find is getting the game with a "Profit:Volume:Enjoyment:Varriance" ratio 'm happy with.
6-max seems the most obvious choice, but this seems a very popular game these days, some might argue this means more fish, others might argue this means more regs/grinders. Volume can also be good. Variance is pretty brutal in this format which i also find abit off putting as it can really effect your volume and winrate if yo u don't have right mindset. Strangly i don't mind Heads Up, thats probably because is very enjoyable. Anyway problem wth 6-max when you reach NL50/NL100+ is you carn't really expect to make massive profits as there are alot of very solid players. So from this perspective this game doesnt seem like the right game.
MTT S&G's Can and are pretty fun except variance is high which means you have to log high volume. This can be a problem as each MTT S&G last for a certain length of time, you carn't just leave when you want, this means either allocating large chunks of days to grinding these, it makes life management as a whole a very important skill to attain. The biggest issue with these however is there doesn't seem to be much traffic above the $15 level, so how the F**K are you meant to A) Earn solid money B) Get enough volume when games fill up super slow?
PL0 i would never consider aprouching as a game i could reg/grind, way to sick! but very fun if you have spare money to spew/donk around with.
This leads me to a conclusion that i think it's better treating poker as a fun hobby rather than a nice source of income (which is a sad thing to say seeing as i was making solid money before full tilt).
This conclusion however doest help me decide what game to play!!! So any suggestions would help