The only thing I regret about buying my ps4 is buying it right before (like a month) the prices dropped by $100 (grrr).
It seems to be the clear best choice if your only going to get 1 of the newest gen consoles. I still have not picked up a Wii U, and may never do so (Especially if the next nintendo console has backwards compatability). Even after all this time there is only a handful of games I would want to play on the Wii U, and it's not worth getting a system for them.
Xbox One does have a few games I would like to play (sunset overdrive for one), but again it's not worth the price for a couple of games I can't play on my ps4. Meanwhile the ps4 was the cheapest (even when it hadn't dropped in price) and can play all the multi-platform games (that are not on my pc as well), and had bloodborne.
Total no brainer for me, and there are a ton more ps4 exclusives coming out soon, including rpgs and platform games (my favorite genres).
The ps3 easily won the contest for last gen consoles for me (I have them all), with the WII actually beating out the xbox360 by a small margin. The ps2 of course may be the greatest collection of games of all time and easily won that generation, and while nintendo gave the playstation a run for it's money, I'd still say the original playstation won as well. So it's been a pretty clean sweep for sony in my opinion, and that also leads people to feel safe in buying their system. Doesn't hurt it's cheaper though.