I hope he'll never change, either! :-)
I think as long as he has his family to keep him well-grounded, he'll probably stay the same as he is now. So, I really hope he keeps close to them, mostly Jasmine, because she seems to be the one who keeps him in check.
My mom said, "That's how he is now, but look again in 10/20 years." As much as I hate to say it, she's always right about these things. She's practically a prophet! It's creepy how her predictions always come true. But, she did say, "Look!" not necessarily that he would change, so... There's definitely a possibility he would remain the same.