We've been to WDW with my kids one (two years ago) and are planning our first Disneyland/DCA trip in the summer. Am sooo excited. I know it'll be a different experience and that's actually a good thing as the first time visiting is always the best as you're trying/seeing things for the first time.
I've heard others mention point #3 above, but it's one that I don't get
....mostly because when visiters go to WDW, a lot will go for say 10 days (we only did 4 plus an evening)....and that is split between up to four parks. BUT when visitors go to Disneyland/DCA, they only go for say 2-5 days. To me, that sounds like there is much less to keep you busy. I know travel time between parks isn't as much, and even walkable at DL, but that can't more than double the time.
We're debating between 3 and 4 days so have been thinking lots about the best number of days which is why it's fresh in my mind and comparing the two.
PS - That's really neat that the characters just walk around the park. I think WDW used to be like that (I went as a kid 30 years or so) and don't remember having to line up at specific spots to see them. Disneyland seems like the good old days.
PPS - Looking forward to trying the rides/seeing attractions that are not at WDW such as Mr Toad, Snow white , Carsland, World of Color etc
PPS - One disadvantage at DL is that my understanding is there is no Wifi. Since we're coming from Canada, we won't have a data plan and thus, won't be able to use the app for wait times while there. (Having said that, my DH is phone addicted so I'm also not jumping out for a plan or he'll be on his phone while we're there instead of "with us".)