Plan to spend some time by the pool. Great loungers with super-thick pads. There is also usually something that happens by the fireplace in the lobby every day around 4pm- either a story teller for the kids or music of some sort. It is very relaxing to sit by the fire and mellow out for a bit.
We really enjoyed the Fantasmic reserved seating dessert package- we did this 2 years ago, so I am not sure about the details on this anymore. But we had a great view of fantasmic, chairs to sit on, and a box of tasty desserts.
We have also done the Segway tour, Cruizin' California Adventure. This was great fun. Tour guides were laid back and it was nice to see the park prior to opening.
There is a Sunday Gospel Brunch at the House of Blues in Downtown Disney. We have never been to this location, but did go to the same show at HOB in Hollywood and the show is very good. Loud, but good.
We LOVE the morning buffet at Storyteller's. Pretty low key for a character breakfast and good food.
In general, we find the dining options at DL to be less inspiring than those at WDW. Blue Bayou is over-priced but we love it and it has a great ambience. Cafe New Orleans is pretty good with some of the same dishes, but the check-in area is chaos (as is the restaurant itself sometimes). I would probably make a reservation for one or the other. White Water Snacks at the Grand Californian is pretty good quick service. We also like breakfast at La Brea Bakery in Downtown Disney (try the pretzel bread), and of course smoothies at Jamba Juice (also DTD). There is also a kettle corn cart in DTD that we like. Otherwise, we do not get too jazzed about dining in DL.
Disneyland has narrower walkways than the parks in WDW and they can get gridlocked (like the traffic here in So Cal)- especially Tomorrow Land in the evening and the area around New Orleans Square before, during and after Fantasmic.
Some of the rides are different at DL- for example, Space Mountain (better at DL IMHO) and Big Thunder Mountain (better at MK IMHO), so ride things that you are already familiar with and see what you think. Fantasmic seems way better to me at DL. Maybe there is something wrong with me, but it never seemed to make any sense when I would see the show in Florida.
If Billy Hill and the Hillbillies are playing (in Frontier Land), see this show. It is hilarious, even if country music and corny jokes are not usually your thing. If you have young kids, Big Thunder Ranch (a petting zoo type attraction) is nice. My six-year-old niece loved it.
Hmm, that's all I can think of just now... You will love VGC, it is one of our favorite hotels anywhere. Have a great visit!
H