Chopper's posts are too long to read (too much drinky drinky), I'll be leaving soon so he can take back over

If villain will call 100% of the time and you are 100% you're ahead then you want to bet the maximum (all-in). However that's not the case. If you're 100% ahead and he calls the $10 bet 75% of the time, you're eV is 10*0.75 = $7.5. If only calls the $20 bet 25% of the time, your ev is $5 and it's better to bet less.

I was going to mention in the other thread but I forgot. You need to get and read HOH (Harrington on Holdem). It will clear all this up very quickly. Try your library if you don't want to spend the money. Yeah it's for tournies, but the 1st covers very basic topics which are also applicable in cash games.

P.S. He's called "Action" Dan as a joke, because he's tight.