I somewhat feel like I'm being addressed here. I can only speak for myself but I'd agree, that this is more like being myself. Yet things/reactions that happened in my childhood/youth are ingrained so deep in my brain, that barriers where formed and the true self is somewhere in there.

Drinking partly breaks down those barriers. Good friends I had for a few years now also helped with this, so around them it became easier being "myself".

I'm a bit like this, like less extreme at either end but I'm much more confident when drunk, I feel good about myself, I take pictures, I laugh loudly at jokes, I tell my own jokes. I think it's closer to my true self. As a kid I was very outgoing, I'd talk to anyone, I was a theatre kid and did solos in the choir. Life has made me a much more reserved person, slow to speak and more happy to listen. Not a bad thing really but probably not my natural personality.

As a shy person, I hope that drunk me isn't the true me. That guy was an asshole

When I still drank I was very much like this! It's not that I actively make a point to "suppress" my personality when I'm sober, it's more like when I would drink every thought that popped into my head suddenly seemed like a great idea lol

If I had to put a name to this phenomenon, I'd say drinking just turns off the common sense filter in my brain

Yeah it's probably the case. The alcohol sheds their filters and social reservations that other people don't have at all in the first place. At least I feel like that when I drink. I don't do parties without a few drinks for that reason.

Social anxiety is a bitch but a little bit of booze washes that little crippling demon away.