Sometimes I still tuck it in at the side, but now I have to wear suspenders so it's tough to tuck it in.
I used to have the Mission M2 pants (I think) and since I have a really short body I would tuck it in and you could hardly see the numbers. Then I had to pull it out some so the refs could see my numbers.
Edit: I didn't tuck it in for looks, I tucked it in because my jerseys were always really big.
"I channeled my inner Morneau, took the stick and hit the mother****** to the moooon!"
The less I worry about looks the better I play, sometimes it gets tucked in sometimes it dosn't. I try to just because playing in a beer league with a bunch of amatuers it allows them to see the top of my breezers, hopefully they wont push on my back above that point. Then again there are some goons that will.