I think I understand what you're getting it. First, you may simply just acquired a higher tolerance over the years. It effects everyone differently. With steady drinking, sometimes you can fall over the edge into sloppiness out of nowhere. Depends on so many variables.
I will say that if your friends behavior when they're pounding drinks bothers you, then you may have evolved passed that. I know one guy who turns into an emotional 15 year old when he gets a buzz on. "Whooaz" this and "B*tches" that. He's 49 too. Has patio furniture as well lol.
Don't overthink it. Change your scene if you feel the need or simply adjust as you go. Do whatever makes you feel comfortable. Cheers!