Totally relaxed winger here! Most days I just go out to the bus stop and get on whatever bus comes first. I don't make ADR's, and don't even look at park hours until I get to the park I end up in (if then). I tend to spend a lot of time at Epcot, because it's my favorite park, and not so much time at AK because it's my least favorite. In fact, the last time I got on an AK bus, when it dropped me off at AK, there was a CR bus right across from me, and I got on it and went to MK instead!
About the only planning I do is making the hotel reservation

.
I will say that I travel during the less crowded times, so it's not unusual for me to walk in to a TS restaurant and be seated. I might do this a couple times per trip. With an AP, and living close enough for day trips, I don't stress over what I get to see and what I don't. I just go with the flow. I've had some really great experiences that way.
I can certainly understand that people who don't get to go very often would need to do a bit more planning to maximize their vacation. I am just fortunate that I have the option of being more laid back on my trips.
Cin - has your mom ever tried an
ECV? I had trouble getting my mom to try one the first time - until we got stuck in MK for three hours because she was too tired, and in pain, to move because she overdid it. She had to have a lie down in the park just so we could get back to the resort. The next day we were going to Epcot, and I just rented the ECV. I told her (nicely, of course) that I got it for her, but if she didn't want to use it, I would. She decided to give it a try, and we never looked back. They can be intimidating for someone who hasn't used one before, but a few minutes of practice out of the way of everyone else, and she was a pro. The biggest thing is learning to turn and stop - once you have that mastered, it's no big deal. She didn't ride it all the time. We would park it outside of shops and restaurants, and at the exit of some attractions, and she would walk in. But it really helped a lot. I actually had trouble keeping up with her!