The attention to small details is fun in Toontown but the substance isn't there. If I skip Toontown, I don't feel like I have missed anything. The food is bad, the rides aren't very good. The photo ops are good and I like the atmosphere/look of the rides and land.
Critter country is actually my runner up, only because there isn't enough to do there. Splash Mountain has a long line on many days, so I often skip it. Winnie the Pooh may have critics but I like it, I get great photos in the ride vehicle in the loading area. "Blustery day" is awesome on a hot day after splash mountain.
Tomorrowland looks like a leader too, despite being terribly laid out and having 0 to do with Tomorrow, it has good rides. Every trip to Disneyland I ride all of the rides except for Astro Orbiter.
Tomorrowland - it actually brings down my mood. It's crowded and outdated and just all around depressing to me. The theming needs a lot of help; IMO they should just shut it down, tear it up, and start over (well besides space mountian, but that's easy to move the crane around bahahaha).
I do go over to Tomorrowland often to ride Space and sometimes Buzz, which is a lot more than I can say for Toontown. Toontown looks okay from what I remember/see from the train, there's just not much I'm too interested in over there.
I like Pizza Port, although it's nothing special. I have nothing against MJ, but I find hearing the 80's "doo doo doo" music outside from Captian EO cheesy and annoying - it's in no way futuristic and reminds me of those darn silver space suits. Tomorrowland is supposed to actually be futuristic but seems more like a montage of things people back in the day thought were futuristic.
At DCA my least favorite land is probably Bug's Land. That said I don't mind it at all, I actually like the theming and the watermelon smell from the Chew Chew Train lol, plus it's very nicely shaded and not crowded.