Battlefield 4. I mostly liked M16A3-field 3, freaking loved the Bad Company series, and I bought into the new features they kept showing off from people currently playing the beta -- not so much the levolution, but things like giving Recon C4 again, tiered reloads, and trying to be closer to Battlefield 2 or Bad Company than Suppressionfield 3.
Battlefield 4 is pretty infamous now for being generally untested and rocky from release, and now that it's been patched in the past year it still has problems that are never going away. Requiring Origin, Premium, that fucking Battlelog shit, guns kill too fast that there's generally not a lot of skill, oversaturated with useless weapons and attachments, relatively easy for hackers to bypass, the community is a group of angry dicksponges, so inconsistent that it's impossible for a competitive scene to emerge, classes are unbalanced, a funny little thing the community has called "netcode", powercreep in DLCs. It has gotten a remarkable improvement since launch, it is likely my third most-played game on PC, it's a barrel of laughs to play with a group of friends -- but it is far and above not a game for everyone. They still haven't given Rush any love, and Rush was what made Bad Company the best.
Look up some of these bugs on Google that Battlefield 4 had on release that have since been patched, it's hilariously broken and now it's... less so. Cannister shots in tanks, overpowered MAA, one-shot kill from headshots accidentally counting twice, visual recoil, "death shield", headglitching (to a point it's fixed), kill trades.
But really, I don't preorder. The only games I've preordered have been Bioshock Infinite (which I loved), Portal 2, and Saints Row 4.