We went last March
I LOVED Disneyland so much! I'm afraid I haven't been to DLP or WDW yet though so won't be able to compare them, just tell you what I know about DLR.
We spent a just over a week in Anaheim (arrived Saturday, left Sunday). We didn't go to the parks on the days we arrived and left, but went every other day except one, when we went to Universal Studios.
We were there at a very low time just before spring break, and a lot of things were closed for maintenance (including the whole Critter Country area), or being re-furbished. There were no parades, although we did see a small Pixar 'pop-up' parade a couple of times at DCA. World of Colour had opened though and was awesome! My now DH proposed after the show while all the lights and fountains were still on - so romantic
We also enjoyed the Downtown Disney area.
Apart from our day at Universal Studios (which we organised as a tour from our Anaheim hotel), we also did a tour around the Newport area (we are both OC fans!). We were back in Anaheim by mid-afternoon though so spent the afternoon/evening at DLR.
We didn't stay at a Disney hotel as they were unfortunately just too far out of our price range. But I know the Disneyland Hotel has recently had some refurbishment, and I would be very keen to stay there as a treat one time! As ASW mentioned, there are plenty of hotels in easy walking distance, catering to all needs and budgets. We stayed at the Howard Johnson on our first night and were thrilled to bits with it! We even sat on our balcony and enjoyed a crystal clear view of the fireworks. It was an easy walk to the parks and I believe they do some pretty good specials. The rest of the time we stayed at the Peacock Suites, which was booked as a present from my grandparents. It was ok, but not as close as we'd have liked, and nothing really special about it.
I actually wished we'd had more time in the area. I would have liked to visit Knott's Berry Farm, and maybe do a day tour to see the sights in LA, and check out some of the outlet malls. And I could have easily spent another week at DLR, but I think DH had enough after a week. We were a bit disappointed with Universal, but when we went there were literally no lines (ie everything was a walk-on), and we just found it very difficult to fill in the day!
If you wanted to go further afield (which I definitely would have considered if we were staying for 2 weeks), you could think about going down to San Diego. They have SeaWorld, Legoland (though I have heard this is only good for very young children), and the zoos.
We found DLR wonderfully full of charm and nostalgia. As the only park that Walt got to see through to completion, I would recommend every Disney nut go at least once in their lives if they can