Me, I can't stand systems that have tons of games that are mostly garbage. I want to be able to pick up a random game off the shelf and have the chances be good that it will be enjoyable.
This is not the case with systems like the CD-i, 2600, and everything that has ever carried the 'playstation' name. therefore I hate them. (except for the 2600, because the games are so cheap by now the quality to quantity ratio is irrelevant.