I've had my iMac since 2009 and it was my first ever Mac. I still use it pretty much every day, for everything. I don't have another computer. (Sorry in advance: I wrote a novel here...)
Stuff I love about my Mac:
TEXT. RENDERING. This is the number one thing that drives me insane on Windows. I love nice graphics and fonts, and I'm always trying to learn Asian languages (unsuccessfully). Trying to read hangul or especially hiragana/kanji on a Windows box makes my eyes bleed. It's absolutely terrible, in my opinion. Much, much harder to read than on a Mac.
I love being able to sync all my devices through iCloud. Notes, open tabs, bookmarks, address book, etc. I never planned for that, I wanted an iMac before iPhones existed. But it's so nice to have all these things work mostly seamlessly together.
I like the general feel of the GUI so, so much more than Windows, which is honestly one of the most important things for me, because it's what I interact with most, you know? I love the low-clearance keyboard, the 24" monitor (even though it's not retina). I like the simplicity of the experience, it's very clutter-free and zen.
On PCs, I always wanted to customize everything possible or dig into the command line, and I always got into trouble with that. I can follow directions, but when something goes wrong, I don't know how to fix it if I can't Google the answer. So I'd install things like Windowblinds, but then I'd screw up my system and have to reinstall Windows. So I felt like I spent a lot of time fixing things on my PC rather than just using it to make stuff.
I sometimes joke that I like Macs because it's like putting the cork on the fork. (Dirty Rotten Scoundrels reference, anyone?) I mean it in regards to me, not Mac users in general: I can't jack things up on my Mac as easily as I could on a PC. So all the time I used to waste breaking and fixing things on my PC I can now spend actually enjoying my Mac and getting work done on it.
The only problems I've ever had with my Mac:
- Around 2014 or so, Google Chrome started to make everything freeze so I would have to hard restart. Solution: Use Safari.
- Even with Safari, occasionally if I scroll through Facebook or a crappy website too quickly, my Mac freezes and I have to hard restart. Adding more memory didn't help, sadly. So I just try to be careful and scroll more slowly.
- Boot Camp partition with Windows was annoying because the drivers never worked right. I wouldn't have bothered with it but I wanted to play SWTOR and it's Windows-only. It played, but the speakers for my iMac never sounded right on the Windows end, and I had other weird problems like not being able to get anti-aliasing to work right.
- Everything's slower than it used to be. But hey, this Mac is almost 7 years old and I used to burn it up raiding in WoW. I've used the hell out of this thing and it's still perfectly functional, which is more than I can say for my previous 3 computers (all PCs).
Stuff I miss about Windows:
Adobe programs are problematic enough (BF crashed two SSDs on his PC trying to install After Effects CC this month!), but good lord, Adobe programs are SO wonky on OS X. The windows in Photoshop are a nightmare, I always have to use Exposé to find lost windows. Really irritating. But that's on Adobe, not Apple.
Top of my list, something I really miss is that on Windows, a folder that contains images will have some image thumbnails on the folder icon, so you can quickly visually get an idea of what's inside the folder. I find this to be just a hair quicker to navigate through in comparison to reading the title on OS X. Sometimes the title just isn't descriptive enough and I can't remember what I put in that folder. So I wish OS X had image thumbnails on folders.
When I first switched, I had to get used to the fact that if I dragged a folder with the name "Pics" into a directory with another folder named "Pics," the new one would overwrite the old one. On Windows, I have the option to merge the folder contents, which I find preferable. (I'm not even sure if this still is the case in OS X. I just know it was back in '09.)
Always a bummer when certain things aren't Mac compatible, mostly video games. I didn't regularly play PC games, but I would play the big titles and I still try to. WoW and Portal 2 work on Mac, but SWTOR doesn't, which has always been a bummer.
Having to pay even a little bit for Mac apps that can be found for free on Windows is also a bummer. I understand the reasoning, and the OS X apps are worth the money. The trouble is just that I'm not really a typical Mac user. I don't make much money and neither does anyone in my family - they just all pooled their resources to buy me this iMac as a birthday/starting-college gift. So there are many apps I've gone without because I just couldn't afford to buy them. I feel like there are a lot more free or ad-based apps now than there used to be, though.