Disneyland is amazing! I am a WDW vet who visited three years ago and went three years in a row!!! It really is wondeful!
Best Fireworks show is at DL - Remember Dreams Come True
Best Stage show is at DL - Aladdin
Best Nighttime Performance is at DL - Fanatasmic!
Pirates, Space Mtn, All of Fantasyland, IASM, Railroad, Autotopia, Toontown, TIKI Room, Main Street are all better at DL. Now they have World of Color, next year they are adding Little Mermaid, and the year after that its Cars land. Walt walked the park. He lived there and you can feel it. The nostaglia is amazing. The details are incredible.
Don't get me wrong I love Disneyworld. It is an immense resort but I have to give Disneyland's two parks a thumbs up over WDW's four parks.
My favorite ride of all the parks is Disneyworld's Splash Mountain. If Epcot was built at WDW I would never go back to WDW. California's weather is consistently better.
Here is one of my favorite quotes I've heard and I tend to agree with it:
"There's an answer the old timers at Disney like to give when asked to compare the Anaheim and Orlando main parks, and to me it still applies as to how they are currently run: Disneyland is a park designed by a father for his daughters, while the Magic Kingdom is designed by a committee for the hordes."
So go and have fun.