Well, I can tell you why it wasn't for us. I have the unique perspective of having bought DVC and then sold it 3 years later. It wasn't the cost. We bought a BWV resale and paid cash. It wasn't the maint fees. I had them deducted from our checking acct every month and didn't even notice them.
For us it was a lot of other little things. First of all, we really ONLY liked our home resort and the BCV. We mostly stayed in the Epcot deluxe hotels pre-DVC and had zero interest in SSR, OKW, HH, Vero, VWL. So, we would book BWV and after 3 trips, it got a little old. I would have booked BCV, but called at 7 mos once and found out I'd have to go straight on a waiting list-no thanks. That would completely freak me out. I like knowing where I am staying way, way ahead of time.
I also really missed the set up of the deluxe hotel rooms. We have 3 kids and like the 2 queens and daybead set-up. I thought the king was a total waste of space and I sleep on one at home! I hated the sofa bed/king setup of the 1 bedrooms-we stayed in them twice. The 2 bedroom was nice but a lot more points and not really worth it to us. I would have much prefered one hotel room in the BWI. We don't cook on vacation, ever. We have the deluxe meal plan booked for our May 08 BC stay.

So, the kitchen meant nothing to us.
I hated feeling locked into the BWV for every Disney trip. I wanted to stay at the other Deluxe hotels-POLY, YC, BC, GF. I felt "trapped" almost by DVC. I know some people may find this odd. We ate Dinner at the POLY during our last DVC trip (Oct 06) and I was depressed. My son and daughter were asking if we could stay here next trip (they don't understand the whole DVC point thing). I told them that "no, it's not a DVC resort and not the best/smartest use of our points." I felt really upset by this. I WANT to be able to stay at the POLY for our next trip, or anywhere else for that matter. The GF is not my top 3 resorts, but I may want to stay there SOMEDAY. With DVC I never would, ever.
I also really, REALLY missed the daily maid service. I kept thinking I would get used to it, but I didn't. I also got sick of doing/folding luandry. I felt like I was at home! With all the towels we had to wash (no daily maid service!!), I felt like was doing laundry every time I stepped into the room.
I want to go to Aruba next year. I don't want to just hope for a good trade. I want to research all the hotels and call and book the one I like best. I think we have decided on 2 hotel rooms at the Marriot. That's how I like to book vacations. It works for us.
I was thinking of doing a
Disney cruise next year (until we decided on Aruba). I knew that we could not use our DVC points for that. We need the stateroom that sleeps 5 and that is like a gagillion points! Then, if we didn't use DVC, we have to bank the points and I would feel like I was paying maint fees on something I wasn't even using. Again, I felt "trapped" by DVC. Should we go on the cruise, or not waste the DVC points and just stay at the BWV again?
We would have had to buy more points to stay in May. It works better with our kids school, and I just didn't want to do it. DH felt the same way. We sold our contract in 2 weeks at the Timeshare store-they are awesome by the way.
The first thing I did was call the WDW travel company and book a room only trip at the POLY for May 08-(the 08 packages weren't out yet). I was completely harrassed by my husband (and the 2 kids he got on his side) to switch to the BC, so I did!

When the packages came out, I switched to the Deluxe meal plan which we LOVE and added our tickets. I can't tell you how happy I am with this trip we have planned.
For me, not owning DVC seems like a relief. We are now completely free to book any vacation we want, anywhere we want. I am not slamming the DVC program. It's a well run program and we have good friends who own it and love it. It's perfect for them, but it wan't perfect for us. In retrospect, I thought the BWV would be the same experience as staying at the BWI hotel, but it wasn't. It just wasn't a perfect fit for us. I probably should have done more research before we bought, but I had know way of knowing I would feel this way. All of my reasons for selling DVC are not problems with DVC itself, but my personal feelings.