DQ - crowds in evenings and rainy days.
Disney Quest is open from:
11:30 a.m.- 11:00 p.m. Sunday thru Thursday
11:30 a.m.- Midnight Friday and Saturday
Best time is when it opens -
eat lunch there - On the 5th floor is Food Quest where salads, pizza, sandwiches, and other counter service items are offered,
then bus it back to TTC - do the monorail and hit the MK or EPCOT in the late afternoon.
At DQ:
Head to the Explore Zone first before the lines form. The Score Zone and Buzz's Astro Blaster also are popular.
After that, take your time and explore all the levels of this wonderful playground. You will find something for everyone, regardless of how old you are.
info above from:
http://www.wdwinfo.com/downtown/disneyquest/dquestmain.htm