If you're set on a Disney hotel, I was impressed with my stroll around the Grand Californian. It has exits right into both Downtown Disney and California Adventure (you literally walk out the door and into the park), and the theming inside made me think of Wilderness Lodge. Very rustic and relaxing. If I were to pick one of the DL hotels, I think that would be it...with the Disneyland Hotel a close second. (Mostly because of all the cool Disney memorabilia stashed inside there.)
Just to throw it out there, there are many off-site hotels that are practically as close to Disneyland property as Disney's 3 hotels. If a Disney resort for its own sake is what you need, then obviously this won't matter — but if you just want to be close by, there are dozens of hotels within walking distance of Disneyland, unlike at WDW.