As a 98 lb weakling, I don't have the upper body to pull it off. I would not wear it to a wedding unless I hit the gym every day for the next two years and got rid of my damn tinkertoy elbows.
To the question of donk or bro, I would say it all depends on the person wearing it. If the person wearing it initially went through Brasky's thought process of whether or not it was donk or bro, it's likely bro. If the person has a closet full of short-sleeve dress shirts and wears them because he doesn't know better, it's likely donk.
That said, my go-to is always the long-sleeved shirt with the sleeves rolled up. When I'm at work, just above the wrist and with tie. If I'm going out, maybe just below the elbow, and if I'm feeling particularly ambitious, above the elbow (or if the shirt has a button strap keeping the sleeves rolled up)