High variance is a result of taking more risks. Playing for big chunks when you're slightly ahead. It's a result of being more aggressive, less conservative. Raising your draws in position for the fold equity. Coming over the top of weakness. Stuff like that. In a nutshell, variance is pushing large on small edges. Some people prefer it. It's correct in it's own way.
Your variance probably has everything to do with how you play. I always come back to the age old EV riddle presented here months ago...
You have Qs Qh. You and two other stacks have $150. You raise to $10 preflop on the button and get two callers in SB and BB. The flop comes out 7c 9c Qc. Immediately SB goes all in for $140, and BB calls $140. Including dead anties, there's now $316 in the pot and you have $140 left to potentially put in on a suited flop holding top set. What's your move?
The answer is it's correct to call because of the odds of pairing the board + quad outs vs the pot. It's +EV.
It's a call I wouldn't make. Would you? This is an extreme example, but variance has a lot to do with how much you want to risk in the name of +EV.
How much do you push around with a small edge on the flop?
Basically it sounds like you're not a grinder. You prefer the action on the front line.