Agreed it doesn't need to be a fun car. But it is fun to talk about what it could possibly be.
Ultimately I'll probably end up in the smallest CUV segment if I'm buying new. If I can keep this car for 10 years and only put 30-40k miles on it, reliability shouldn't be too much of a concern. And it'll serve me well when I ultimately graduate from my m3 and into my next bucket list car... a 911
Corolla cross
CX-30
Hyundai kona
Etc