Currently using the 360 and was leaning more towards the PS4 before E3 and now after E3 I'm sold on the PS4. Not gonna get it for now though. Will just stick it out with my Xbox for another years or so before moving.
PS4. I will admit Microsoft almost had me with the announcement of Killer Instinct, but when I found that Double Helix is involved and it was a downloadable game only, I was like, "Well it looks like KI is pretty fucked."