Originally Posted by Achilles_
Meh, I can't stand short sleeve shirts. Just roll up your sleeves!
Try living someplace where hot doesn't mean 80 degrees.
Short sleeves make a big difference in airflow inside the shirt, which is important in hot weather. Just don't wear any short sleeve shirt with a tie. Ever. Despite the, "well, perhaps you could try it" line from the WSJ, don't. You will look like a fashion victim. Same with the blazer and shorts. Just don't.
And yes, tucking in is fine. You should be tucking everything in more often than not. Untucked shirts, unless they fit very well and have an appropriate hem, just come out looking sloppy. Knits like polos or tee shirts you can get away with as a bumming around look, but even with those, tucking 'em in sharpens up your look. Especally if you have a waist that you can accentuate, which makes you look nice and fit even if you have an average build.
The michael kors photo shown is how I've been wearing 'em for years, minus the contrived over-long belt. Patterns or texture, matched with appropriate jeans or shorts and tucked in. Casual enough to wear a ballcap with, polished enough to outclass just about everybody else's casual dress during the summer.