I also do not like the key options on the M3.
All of my cars with key fobs have the fobs hanging on hooks just inside the back door. When walking out the door, there's all the keys. If I forget to grab them when I walk out, all I have to do is reach in the back door.
More than once, I've gone out to get something from the M3 only to remember, when I have my shoes on and I'm out the door, that my phone and wallet are on the nightstand in the upstairs bedroom. Back inside, shoes off, trudge upstairs, retrieve phone, back downstairs, shoes on, back outside.
Just give me something I can put a door key on and hang with the rest of my fobs. It is annoying that a $40k car doesn't come with a fob.