Chromatic aberration becoming so popular is bewildering. I understand intentional imperfections can make things look a little more real, and I'm okay with it being used sparingly and appropriately. Good examples are Kane & Lynch 2, where the whole game looks like it's been shot with a cellphone, Alien Isolation with its 70s cinematic style, and Guild Wars 2's use of it for ley-line effects, where small parts of the environment are practically melting from magic energy. It's a tool, and like all tools there's a place for it.
But you have a lot of modern games where it's slathered all over the screen for no reasonable purpose. It's a painful effect to look at for long periods of time, essentially being an artifact from poor camera focus, so why you want to make your whole game look deliberately bad is bizarre. As trendy visual effects go (bloom, colored lighting, etc.) it's easily the worst I've encountered, often a lazy stretch towards some sort of faux-authenticity from an old-fashioned look, and I'm really excited about whatever comes next and replaces it. Looking at it for long periods gives me a headache.
Vignetting I'm mostly okay with. I can't think of any games that really overuse it, and unlike something like chromatic aberration the impact on the overall image is generally quite minor.