You're going to get every response in the book here. I love WL, some people don't and they'll tell you they love the Poly best, etc. Each resort is going to have supporters and detractors, and each resort will always have some disappointments in it.
The question you should be asking is "If you had no kids, 2 adults, likes MK and don't have a rental car, which resort do you recommend?" That would narrow your field down significantly.
All WDW resorts are great, from value to deluxe. Deluxes have the most amenities but also costs the most. If you're a hot tub person, then value isn't the way to go. If you like bright colors and big giant icons, values are wonderful. If you like indoor corridors, then go deluxe. If you need to be close to Epcot, the Epcot area resorts are your best bet. If you want easy access to nightlife, POR and POFQ are a good deal because they have boat access to DTD.
It's all in your preference, budget, and what you'd like to do.