The difference between DL and WDW is that DL feels like a park that a daddy built for his daughters, while WDW feels like it was built by an executive committee for the WalMart/'Murica crowd.
Though I might have chosen a bit different wording here, BINGO!
DLR's got that quaint, beautiful feel to it.
My husband and I took our first WDW trip back in February and we actually had an amazing time and will go back in a few years, but we still love Disneyland best. I was in love with Disneyland before I ever set foot in the park. I was initially pulled in by the return of Captain EO (yes, seriously, I love MJ), but I love everything about DLR and I came to love Walt Disney as a person and as an immensely successful business enterprise (I have a BS in Business Administration).
Back to WDW, there were many things we loved. I am THE planner and my husband was given information by me about our trip and many opportunities to give me input, but he was overwhelmed at POR alone when we first arrived, haha. He also was amazed at how wooded the WDW property is, given we are used to DLR. We really enjoyed all 4 theme parks and were really surprised that we loved Hollywood Studios as much as the other 3! Maybe I'll get flamed for this, but with the exception of the Japan and Mexican pavilions, I was personally a little underwhelmed by World Showcase in Epcot. I actually love Future World more. Animal Kingdom was really great and my husband's favorite park. Magic Kingdom is great, BUT it's just not Disneyland and comparison is inevitable. I missed my Matterhorn real bad there. We ate at Coral Reef, Sci-Fi Drive In Diner, and Sanaa and loved all 3, especially Sanaa. Animal Kingdom Lodge is awesome and I'd love to stay there sometime and I know my husband would, but cha-ching!
The buses were pretty great for us except for one day when we ended up waiting maybe 20 minutes for one to show up.
We took a day off from the parks to take the boat from POR to Disney Springs and had a great day there as well.
Long story short, loved WDW, but DLR still has our hearts.