In a nutshell, personal preference.
I have several thousand hours in GA aircraft, many types, trainers through MU-2s, but had never sat in a Mooney. I realize many folks love their Mooneys and that is great. For me I didn't like the way I sat in it, the forward visibility, the handling, and the way it took off and landed. Probably some of the exact things people on this forum like about their planes.
I could have made it work but I want to really enjoy flying my airplane and for me the Mooney didn't do it.
So, it is important to try an airplane on for size to be sure it is a good fit (literaly and figuratively) before getting too far into the buying process. All the good specs, maintenance history, etc. don't really matter if you won't be happy flying it (if one cares about that).
Don't mean to step on anybody's toes here, you've all been great.
Good luck with your purchase.