We took our first trip to WDW in Oct 2011...we've been to 11 times. For us, WDW was much more like a vacation. We were able to stay on property..something we can't do at DL. The whole experience was just different. Both have perks..we like the nostalgic feeling of DL, knowing Walt Disney himself walked those streets. WDW was a bit more magical for us...as it is really like you are in another world. Its all just Disney (unless you stay off site I imagine). Even when you leave the parks, unlike DL where its hotel after hotel..busy traffic and panhandlers sitting along the sidewalks. We loved the ease of the transportation system in WDW.
We didn't find WDW run down at all...but we did find DL to be cleaner. We all, at one point or another, said out loud "we would NEVER see that at Disneyland!". We also found the crowd control at DL to be much better than at WDW after the fireworks and fantasmic.
We all agreed Pirates of the Caribbean is far superior at DL...and of course WDW doesn't have one of our favorite rides...Indiana Jones.
They are very different, and we just LOVE both. WDW was a vacation for us...Disneyland is more like a getaway, we can go for 4 days and be just fine.It has a more intimate feel. WDW had the more "wow" factor for us