I'm in the same boat as Danny, mainly a 360 gamer last gen, switching to PS4 this time round. Think that's fairly typical of gamers that don't have a strong allegiance to one faceless multinational corporation or another. The vast majority of games are multiplats, it just makes sense to go for the console that's cheaper and runs multiplats better.
I'll probably pick up a One eventually, when the price comes down and there are some exclusive titles I want to play, but right now going for the PS4 is a no-brainer.
JamDev's comments