Scott B 
2015 BMW M4 Coupe 2dr Coupe (3.0L 6cyl Turbo 6M)
After 1 year, still love the M4
 First, the performance of the car is best experienced on a track.  I've taken my M4 to a few tracks in the area, and it is unbelievable how well it performs.  I have the DCT transmission, and I know most enthusiasts would frown upon that (eg not a manual gearbox), but it's amazing what the DCT does and how it performs especially on the track.  I doubt you can truly appreciate it on normal streets.   No mechanical issues or problems with the car after the first year.    Only performed the regularly scheduled maintenance.  No interior issues (eg things breaking like handles/knobs).  I did get a "wandering eye" as I was curious about the MB C63 AMG and Alfa Romeo Giulia.  I struggle with reliability of MB and still waiting to hear more on the Giulia.  The only thing that bothers me, a little, is that I wish the M4 had a better exhaust note.   I will say that the one best piece advice I had heard was this: "if you don't plan to take the M4 to the track, consider purchasing the 4 series."