Too many cars can be a bad thing
I know I've been there several times, why you might ask, well I am a car nut LOL.
I had a e46, 2002 then got myself a a e85 eventually sold the e46 (big mistake). I sold the e46 due to pressure from the wife and a slight traffic jam in my drive way LOL.
Eventually I traded the e85 up to a e89 ... some bad issues with the e89 then I got back into a ///M3 (since I missed my e46).
Bottom line, if I had to do it all over again, I would have rented a e85 or e89 for a spell to check it out ... so my recommendation to you would be rent a mini for a spell before you make your final decision ... just my 2 cents.
and ... no you are not crazy at all the mini is a fun car.