So, Takkun...now you have your answers! 😉
This thread is a perfect example...everyone's experiences and opinions are different. Choose what you want based upon your needs, then your desires. Free advice: Just don't overextend yourself financially for any camera or system (unless you're betting on a legitimate business model).
My own opinion: I've owned them all, they are tools with strengths and weaknesses. None are magic, though some can inspire more than others. If you have multiple systems, go dSLR and RF. If you can only realistically afford one camera or system, make sure it has the flexibility you need. I personally own a 5DmkII, X100, X-Pro 1, and an M9. They all have their own limitations.
My perfect toolset is the 5DmkII and M9. If I could only own one (or one system), it'd probably be the X-Pro 1...it's a hybrid that does everything pretty well.
Realism aside, my favorite is the M9, and I've used it for 98% of my shooting since I bought it. It was an emotional investment in my passion...and I think I'm better for it. This has demonstrated to me, however, how often I require ultra-low light capability, fast shooting speeds, or longer glass (about 2% of the time).