I do not think I play all my characters in character. SHOCKGASPHORROR!!! "Oh my god," you must be thinking, "Have you no shame?"
Well. That's what the dickgirl icon is for~
But that's not my point. All Role-players are not in character. Yes. None of them. They can be REALLY close and pretty good! but never 100% IC. Why is that? Mostly because we're what we say we are. Role-players. We're certainly not the creators of the character we play (unless it's an OC and it's a whole different ballgame which I won't even address here), so to claim we're 100% IC? Is false. Just like the human mind changes and adapts, so does the character, but we can't profess to know. We can presume and trust me, a presumption can get you far.
What I like about role-playing (and what I'm finding out with my leveled up experience with different styles of role-playing and games in general) is that; we all bring out something different in the character. Whether we focus deeply on one aspect and not so closely on the other. And that's what really counts. Not that you're 100% IC, but you're doing something different. That you're the fish swimming in the opposite direction of the shoal. That you're the rooster among hens, but not quite the peacock.
So. A general shout-out. You're not doing it wrong. You're doing it your way. Maybe you've gone on a really wild tangent. Maybe you've found a nugget of information that no other player of your character has found. Maybe, deep deep down, you found something of you in them and you want it to shine.
It's up to you. Have fun, bring something new to the yard. I'm sure I want to see it.