I want to fanboy but I'm going to refrain from doing so for the topic.
My honest opinion (which obviously must be true:
Xbox over PS3, PC over Xbox.
Why you say? Well, it's just a preference. In terms of Xbox versus PS3, it's just because I've been using it so long and I find it more fun because 90% of my friends play Xbox, versus like 2 of them playing PS3.
Although the PS3 does have Blu-ray, it seems to have a much stufftier network connect due to the fact that Sony puts less of their money into PSN because they don't really rack in money from that department other than PSN cards. Most of their money comes from console and game sales.