Contrary to the experience of jbdreamer, we have stayed in many offsite timeshare resorts over the last decade, most of them within a 5-10 minute drive of Epcot, Disney Studios and/or Animal Kingdom - literally 10-15 minutes tops from our door to the turnstiles. While we have sometimes taken only 5-10 minutes to walk from a Disney deluxe hotel to the closest theme park, we've also taken nearly an
hour to reach a further park from an onsite hotel using Disney transport - 20-30 minutes to wait on a bus or boat, 10-20 minutes to ride with multiple stops - ugh!

So our experience has been that it can easily be FASTER to drive from a nearby offsite locations to the parks (except MK but including the water parks and DTD) than stay onsite and use Disney transport. Even the deluxes can have slow transport to whichever parks are not the very closest. If you choose an offsite location that's further away (say 10+ miles from WDW property), then naturally, you'll experience longer driving times. Choose wisely if this matters to you, as it does to us!
Did anyone who moved off-site from on-site miss the feel of Disney or were you close enough that you still feel like part of the action?
When we first moved offsite, we noticed the difference. I wasn't sure how I felt about it but the rest of our family loved it!!! DH felt less of the constant Disney marketing machine, which he finds shamelessly self-promoting and money-grabbing. The kids relaxed more, enjoyed the pools and other activities more and didn't feel like they were just waiting for the next chance to go on rides. They napped/slept better too without so much overstimulation. I wanted a bit more Disney back then so...
I made sure we had Disney music for the

car ride, Disney

bubble bath for the condo jacuzzi, Disney t-shirts

from the outlet stores in advance and Disney snacks

in the fridge. That all pretty much took care of it for me.

As we all enjoyed the offsite resorts and other area attractions more and more

and we could afford more restaurant dining

and character meals

, we also found that we cared about the minimal "difference" less and we now prefer offsite. It's just a more relaxing, better overall vacation for us.

To each their own.