1) Hardware ...
Fair enough, I get this, but I also found that if its your main professional tool, a few hundred either way isn't that big an issue.
2) I've grown up using Windows
I actually found that learning OSX stuff is quite simple if you just see it as a tool as opposed to a hobby.
3) I hate all the program menus being at the top of the screen.
Fair enough, guess that's personal preference.
Seems like you have fairly decent reasons for your choice, but I couldn't go back.
1) Hardware - cost is 1/2 Mac hardware, and I can upgrade cheaper as well. For example, my ultralight notebook came with 4GB Ram and a 128GB SSD. For ~$1000 - Mac equivalent was ~$1400 at the time, with no option to match the screen (1080p). Since then, I've upgraded but the SSD and Ram for another $300 - would have cost almost $700 to do the equivalent upgrade on the Mac and it would have been at the time of purchase.
2) I've grown up using Windows, CMD, batch files, etc. I know my way (a little) around the registry, services, etc. I'd have to relearn all of that on the Mac.
3) I hate all the program menus being at the top of the screen. I have a Mac on my desk at work...and it just drives me nuts. I'm sure I'd adapt, but it bugs me.
I could find more, but I've come to admit that I'm just a Windows user. If I need Linux or something, I just install a VM and go to town.