I grew up on the east coast, and we drove down to WDW every 2 years throughout my childhood. I think I went about 10 times over that period. As an adult, I have made 5 trips to WDW (and will be making another later this month).
Fast forward to when I was a young adult, and I got accepted to grad school in California. I moved out west and never looked back. Now I'm in Northern California, but only a 5.5 hour drive from Anaheim (impossibly close, by east coast standards of driving to WDW). And we find that we drive down to Southern California at least twice a year. And every time we go, we visit DL. I've been to DL now more than I have been to WDW... so many times I have lost count. I think maybe 20?
So I grew up thinking of WDW as 'Disney', but as an adult I have come to know and love Disneyland. Personally, I prefer Disneyland, but I admit that this may be because I now consider it my 'home' park. But in my heart, I still love WDW as well, and we visit WDW regularly (although not as regularly as we visit DL, obviously). Both parks have their own charms, and while in some ways they are similar, they are both very unique experiences. I wouldn't pay all of that money to visit WDW if this were not the case.
So the answer is, if you love Disney, you will love both. It's not going to be exactly the same at DL, but that's part of the fun. Embrace it as a new park (well, as 2 new parks) and enjoy!
As a aside, ever since the advent of FP+, I have seen a huge influx of WDW vets coming to the DL boards and asking questions. At least among the DisBoards crowd, it seems that many people fed up with what is going on at WDW are giving DL a try. So you would not be alone in doing so!