I've had my M135i just over a year now, so here's my quick thoughts on those options.
It's a great rwd car while also being v practical.
Auto - everyone raves about it, but in all honesty, if I was to spec again I'd go manual. It's my 1st auto car and I just find it less engaging to drive. I miss that additional connection/thought of choosing appropriate gear based on the corner coming up, etc. Yes, the car can only be quicker with the auto (and apparently about 10% better mpg, as it's got 8 gears to play with), but once away from booting it in a straight line (motorway slip roads) and on winding roads, I personally find it mutes the experience.
Adaptive - As far as I've read, the non adaptive is almost as firm as the adaptive in sports mode, so it effectively gives you a softer option when in comfort mode. Yes, it makes it smoother on bumpy roads, but if you're blessed with smooth roads near you (admittedly, who is these days?), then it's possibly not a must have? For the roads around here, I'd probably spec it again.
Interesting, I have had my 135i about 9 months and really like it as well. I got the manual and wish I would have got the auto

The only options I wish I had are the adaptive suspension and the HK audio pack.
Otherwise a fantastic little car that is deceptively quick. When im looking to swap in a little over a year, it will be another 140i or the 240i.