It sounds like you are your wife are on the same page. The important thing is that you are talking about it together. Remember through the trip as well your love for each other. There is always a negative one in the crowd, but don't let that get you down. Remember you are
DVC members now. You are part of OUR family, too and we welcome you!
Look forward to your first DVC trip, no matter who you have with you and my only advise if it comes to when people want to do different things is this:
1. You do not have to do everything together. It's MORE than OK to let someone go do their own thing (as long as they are adult enough to find their way back. Don't let your 4 year old wander off).
2. DO NOT STRESS about seeing it all. Be OK with doing something that is not your thing. You WILL be back. Maybe you will find fun in something you never expected.
I have a policy (this is toward the second point) to try to find something new EVERY TRIP I take. It does not have to be a new ride or place to eat. Sometimes it's just a new thing to do. There are LOTS of hidden secrets at Disney and lots of things I bet you never knew they did. I have found much joy in things I thought I would detest. So let yourself do something new and give yourself permission to try something different even if it takes time away from what you thought you wanted to do. If you miss something that was on your personal list, catch it next time (the only caveat here is pay attention to what is being sunset so you do not miss your one chance to catch it if it's really important to you).