I think it will look fine. Two panel are my preference anyway, so why not get more of them into your home? Not a problem to mix and match.

No issue. Who comes to your home to go in your kids rooms??

I'd change all of them depending the interior of your home, which is........???

Those doors will look great! Each room in your home can have its "own look",

@JanMoyer, don’t know what id call the interior style. Except for partially updated from the standard 1980’s. Eventually going to renovate to look more modern. Right now it’s somewhat outdated. Can’t afford to do all the doors at the moment.

2 panel for sure if more modern is the plan. I agree bedrooms can be even different from eachother in style, color so not big deal but those 6 panel doors will need to go for sure

What you want to do is fine.