Like do you ever find yourself just having something you'd never actually say, or truly feel, but you just imagine how your character would react to something or the opinion your character would have over things?

pretty much every day on my way to and from work

Waaaaaaaaay too much.

I had moments a looooong time ago where a character would take up resident in some far off corner in my mind, and I'd hear them say something in the back of my head every now and again in regards to a real life situation.  It worried me a bit for awhile, especially when it kept happening during long droughts in my e-fedding 'career' where I wasn't promoing anywhere.  I think it's just having familiarity with a character after awhile and needing to vent by putting pen to paper.  

At least I hope so...

Yes since my characters are apart of me lol

Not really but when I'm in idle time I sometimes brainstorm the direction I want my character to go, or be in soon, and sometimes I take things I see and hear and see how aspects of them could apply to my character.

Only all the time. It's probably unhealthy how much I've been thinking about everything I'm involved in as well as what the season has in store for me.

Not in-character, but when it comes to e-slangs such as pal, I actually use that in real life

Only a little bit. I love saying my opponents are arrogant. When I get upset at somebody else, I would call him/her arrogant, lol.