How to tuck in a dress shirt.

I, surprisingly, know exactly what you mean. I'm getting into the habit of wearing dress shirts for more casual occasions, and it looks real nice for people my age... when it isn't tucked in. But most dress shirts are long as hell and come down to my knees. It's such a problem not being tall. But since you're tucking it in anyway and your major concern is the tightness of its fit, then don't get traditional dress shirts from like the suit section of the department store. Go to Express, Abercrombie, Hollister, etc. Those kinds of places will give you the sleeker, "muscle"-fit that you desire.

Look for the casual dress shirts that aren't folded... go for Calvin Klein or something.

How ya doing, buddy?