A fan? No. But I can definitely be considered one who respects the platform.
My work phone is a Lumia 830. Honestly had I not gotten it for work I probably would never have bought a Windows phone. However, I quickly found myself quite impressed with the platform. Let's deal with a few negative comments, shall we?
- "There are no apps". Technically untrue... there are apps. No, there's no Tinder app or the latest or greatest games but you do have a pretty basic suite of apps that works really well. On a daily basis I use mail, calendar and the phone apps. There's an app for Concur I use for my expenses, and IE on WP is actually pretty decent. Beyond that, I have a messaging app, Skype and OneNote... and when I'm sitting waiting for something there's the News app that works really well. What more do I really need? For traveling I have Uber and Yelp. And that's about it. I don't care about most of the other apps... I even uninstalled the default Facebook app because I don't care about Facebook.
- "The app drawer is a wall of text". Yes, that's definitely true and is definitely a negative of the phone. However, note how many apps I actually use on this thing? They are all pinned to my start page where they can be resized and reordered as I see fit, and they all fit in that first screen with no issues. A little customization and you may never see the app drawer again... hell I can't remember the last time I opened it.
- "The flat UI sucks". Well that's a matter of taste. On my Android phone, icons often get lost in the shuffle because quite frankly my app drawer looks incredibly busy. And discoverability isn't helped when every few weeks some app changes its icon to something completely different. Have you never wondered why so many icon themes for Android try to neutralize the colour palette and make it less garish?
There are many others but I won't go into it... and no, the WP interface isn't for everyone. As I noted above my personal phone is still Android (CM12 at the moment) because I like to hack my phone and do stuff with it... but my Windows Phone does exactly what I need it to do and no more. I am definitely not a Microsoft fanboy but in some ways I find it easier to get stuff done with WP than I do with iPhone or Android... the phrase "It just works" applies nicely to WP but I don't feel it applies to either of the other big players. WP gets out of my way and lets me get to my data.
Now, are there things I would like? Sure... I'd love an OwnCloud client so I can attach to my files more easily. OneDrive integration is nice but I don't like OneDrive. Having my OneNote notebooks on the go is great; many of them are hand written notes on my Venue 11 Pro Tablet and being able to bring them up on my phone for reference is actually really cool. Exchange integration is obviously fantastic, and I really do like the more simplistic UI. Battery life is amazing on this phone... I get 2 days without a charge quite often... and I'm using it a lot. So there are one or two apps I could stand to have that I just don't... but since it's a nice-to-have and not a need, I fail to really care. At the moment I just have a script on my home PC that copies my most recent critical documents from my OwnCloud to my OneDrive... I have long since realized that a file more than a month old is archived so my script keeps only files less than a month old synced with my OneDrive. Since I'm not editing them on my OneDrive and just referring to them it works out really well and only needs a one-way sync!
I can also say the build quality is better than most of my previous phones, too. My Android phone has been dropped once and then replaced because it broke (insurance, thankfully!), but my Lumia has been dropped frequently enough that the metal of the case is a bit chipped... but the glass has remained unaffected and the phone itself works great.