Mass Effect: basically what Reasonable said, and also the dialogue choices too, I couldn't figure out what's so awesome about knowing what's the alignement of the response you're choosing, and most of them were all the same, like choosing to learn more about the situation or not. 00
The Longest Journey: I finished it after playing LOOM, and I also couldn't figure out why it was supposed to be one of the best adventure games ever, especially because I often saw people referencing "mature" themes and most of them were barely touched (the lesbian couple, for example). it felt like a Hollywood movie where they try to tell EVERYTHING in a single movie.
Braid: a good game, but whenever a world was getting good, it was over. comparing to World of Goo, it was exactly the opposite. both presented new stuff in each world, but Braid had so few levels that you couldn't even enjoy a world.