M3/4 is one of the most disappointing cars I've ever driven. I spent a day with an F80 M3 and then 20 mins with an M235i when I took the M3 back to the dealership and told them it was rubbish, so they gave me the smaller car to see if they could get a sale that way.
It was the sport auto option too, so as close to comparable to the DCT M3 as you can get. I reckon the slushbox was nigh-on as good as the DCT, and certainly not noticeably worse at all. Chassis felt much more alive and the suspension didn't want to kill me every time I stepped on the gas which was a bonus. The 235 was proper chuckable, just a really fun car. In the end it wasn't for me as the inside was just too 118d to feel truly special, but now I've lived with an older BMW interior for a bit I reckon I'd have no issues with it. In terms of the drive though, I can remember those 20 minutes as well as I can any drive I ever took in the 350.
I'd still get a manual over an auto though, unless you sit in traffic day in day out. BMW make some really decent manuals, get them while you can.