I bought my first Mac when the Intel Mac Mini came out. Occasionally someone would have a problem with how a web page worked with Safari, and it was an excuse for a new toy to play with. Initially, I pretty much used it as a "media server" -- iTunes, my pictures and some software called "DVArchive" which pulls (and serves to) shows recorded on my networked ReplayTVs. I had a KVM switch so I could switch back and forth.
I also used it whenever I had to reboot my PC after installing software. Just switch over and continue browsing or what not.
Then my traveling computer started to go about the same time the MacBook Air came out, so I got one. This was the first time I used a Mac on a "day to day" basis. When got home from a trip, I would reluctantly go back to my PC.
Last summer my PC was getting a little long in the tooth when She Who Must Be Obeyed's old Dell desktop finally died. An excuse for a new iMac and She got the old mini. She had a few problems with the differences at first but was soon won over.
That being said, there are a lot of things I don't like about Apple as a company. I've never used an apple mouse that had a decent right button. And while iMacs are fine, I wish they had more choices for using your own monitor (nothing between a mini and the MacPro)