Ahhh, that's good to hear on the pills and drinking front, Stone83! As minor league as they are these days, I'm certainly not immune to such temptations either. Between the intensity of the pain and needing so badly for my brain to just STFU... yeah, I get that.
Back to your question on the feeling of being more than one person, I've given it some more thought and....it doesn't seem that way to me
but for being unable to give definitive answers to a lot of questions. It's like I need to know if I should answer for when I'm hypo or depressed. Invariably (lol), they will say something like, "oh, just what's typical". This is no help, as it
totally matters which "mode" I am answering for because the answers are for the most part polar opposites! Hmmm. Which, in a sense, is asking "which one of me" you are asking about. (Ask anyone. Far more often than not my answer to just about everything is, "it depends..." lol.)
Also, it's probably fair to say that people who know me might well think of me as two different people -- the one that bounces around yapping a mile a minute and laughing at a whole lot of nothing (etc.) and the one that hardly says a word and is off in her own world, downcast and expressionless. (There's time in the middle too of course, but you gather the point.) They
never have to wonder where they stand with me. I don't shift around running hot and cold with others. Which is probably important to say, because they know it's all me and nothing to do with them. So they can clearly see Tigger or Eyeore unimpeded by the lens of personal involvement. All that to say, it's pretty crisp, and so could objectively be seen
by others as two different people.
That's as closely as I can relate.
I know who I am. Life is almost totally in grays to me and dichotomies are no problem to hold side by side without distress. So I am all the things I am. Easy-going all the way to rabid wolverine, It's all one. They don't fight (not to say I don't have to stifle sometimes, lol). They just are. Maybe it's a perspective thing??
Sorry to blather on so....must be thinking aloud (BF says I do that a LOT, lol.)

Even so, couldn't come up with an additional person/persona...
(P.S. It feels like I can relate a lot to your wife in the "seeing the true person". My BF is highly changeable in thought patterns. It is distressing to see when he is "off", because he cannot understand the extent. But when he gets back "to his real self" it is such a joy.

)