John - yep.. you hit the nail on the head. My girlfriend and I at some disagreements when I first started dating her.. mainly about me playing video games all the time. We had a talk and I told her flat out.. that it's a part of me. It's not something that would be changing anytime soon. It's something she had to understand about me in order for our relationship to progress. Like you said, it becomes engraved in yourself.
Tree - I think you get your first mount at 30? maybe 40? Don't remember... and yes, you can have a mount and a pet out at the same time. So you'll be riding your mount while a pet follows you.