What determines force strength/control?

What determines how much Jedi power a guy has? Is it the midiclorian concentration or total amount (yoda is small and has a high concentration, but since he's tiny he doesn't have a high total amount I wouldn't think compared to a human sized guy) or training or both or what? Does age bring more ability out?
I know it is fiction, but is there a formula on who will end up being the best jedi (I know that being a jedi encompasses a lot of qualities, not just light saber fighting)? And can an average joe become a jedi to some degree, or is there a cut-off midiclorian level at which you can't do jack crap?

the midi count refers to the amount of midis within each cell, and not the sum total of cells, so as yoda said, "size matters not".

and yes, there probably would be a minimum midi-count for which an individual could use the force, logically.

Balls

Oh no.... not the midi's again.

But I go with what Schecter said.

exactly, Midichlorians. Who didnt know that?

Some of us don't want to be reminded of them.

Originally posted by queeq
Some of us don't want to be reminded of them.

Uh-oh...

How do the little microorganisms get into you to begin with? Can you take transfusions from yoda and get more force-ful?

Originally posted by queeq
Uh-oh...

who is the strongest jedi physically without the using the force

Originally posted by Smoki
who is the strongest jedi physically without the using the force

I better not comment on the Joe remark this time. 😛

Originally posted by Rogue Jedi
man, you SUCK as a Jedi. 😛

Good, no Jedi. 😈

poor little Joe......

Joe again.

I wonder what Shmi thought as she got fatter and fatter while pregnant with Annie.

Maybe she thought: I'm gonna have a baby.

no, I mean more like "whos yo daddy?"

Hehehe

seriously, she seemed OK that she was pregnant yet no one had shagged her.