The most popular gifts for gamer kids and adults this Christmas season: Nintendo Wii, Nintendo DS, Guitar Hero: World Tour and Rock Band 2. An October survey conducted by EBay and Opinion Research Corporation found that of the people who said they want a gaming system for the holidays 44% want a Nintendo system (with 43% favoring a Wii) compared to only 33% who hoped for a Sony (with 31% liking PlayStation 3). One in four women who like games and accessories want a Wii Fit under the tree to help them shed excess holiday pounds. Of gamers, 14% favor Guitar Hero to the 8% who like Rock Band 2.