I have taken my 'corder every time we have gone (03, 04, 05, 06) and will take it again this year. First trip was Sony 8mm, the last three have been with Canon MiniDV, which is much smaller and lighter. Having been bitten by the digital still photography bug, I don't video as much as I used to, but some of the clips are priceless. For example, since Tarzan Rocks is no more (what WAS Disney thinking???), we sometimes pull out the AK video and watch the show. I have also found that some things lend themselves more to video than still photography, like stage shows, parades, and outside rides (like Dumbo, Spitting Camel Ride, Thunder Mtn, etc) and I'll sometimes video the entire ride. I have also taped the entire Illuminations show, using a monopod for stability, which helps tremendously, and means I don't have the watch the whole thing thru the viewfinder, but occasionally check framing in the swing-out LCD.
Since getting the MiniDV, I have now converted all my home video to DVD, with scene selection added in the menu, which makes watching old home movies MUCH easier, as you can go right to the scene you want to watch w/o hooking up the 'corder to the TV, searching FF and REW to find what you want to watch.
My 8 YO frequently asks to see the WDW movies, and we share some yuks watching (and listening) ourselves have fun with the Mouse. I suspect they will become even more priceless to her in years to come, after her mom and I are gone.
Anyway, that's my perspective and my preference.
~YEKCIM