I have been to WDW more often. Mom took us the year it first opened and I have been back a few times starting with the 25th anniversary. Since I can go to WDW more often, I guess it would be my favorite by defalt. However, DL is a superior park. Part of it has to due with the historical fact that it is the park that Walt built. But most of it has to do with the fact that it has a much more intimate feel to it and I prefer the rides more, especially those not found at WDW.
Disneyland, hands down, no contest! It's the original and the sweetest. Walt is still so much all over that place. No matter what management comes in and out, that will always remain. It's the one thing WDW can never have.
Disneyworld by a long shot, because you can't separate the MK from the whole resort. Many of the "extra" attractions at DL are found elsewhere in the World. The restaurants are superior, the resorts are superior, and the garden-like feel of the place is superior. There is simply more variety and diversity and far fewer day-trippers. Disneyland's cool, too, but so different from WDW.
This is a question that gets asked all the time. When comparing properties overall, WDW is the bomb. But between the 2 parks? DL wins in a landslide. It's much more intimate, has had more time to build character, and has for the most part the better attractions (HM, Pirates, Indy). MK of course takes it for the castle and for Tomorrowland, but that isn't enough to put it in first place for me.
Nice to be able to agree with DanYoung again ... DL is so much better than the WDW MK. The whole vibe, atmosphere, attention to details etc ... I would say WDW could be compared with a giant convention hotel, while DL is a wonderful little boutique experience.
You may not be able to compare the WDW resort to DL ... but you certainly can compare parks. DL oozes charm, while the MK oozes overweight, slimed with sunblock, stroller-pushers ... most who don't appear to be having magical times just because WDW is so huge.