cTurtle saidI love love windows for a desktop/laptop, but had a bad experience with windows mobile 4-5 (although i did enjoy being able to access things in command prompt). Also the windows app market is an issue, there's like nothing compared to ios/android.... :/
I'm sure you are a minority for wanting a windows phone phone here but why do you?
Windows Mobile is not Windows 7 Phone. They are two very different mobile platforms.
This is Windows 7 Phone:
This is Windows 6.1 CE (Windows Mobile):
Now to answer your question; Microsoft has been very carefully producing the Windows Phone 7 to be very robust, with many features that I could never get in an Apple phone.
One being Microsoft Office is integrated right into my phone; being able to open my Excel/Word 2010 lab files remotely off of the Microsoft sync drive and update them across all my computers and tablet every time I click *save* = amazing.
It's integrated with my Xbox and Xbox Live account as well as my Zune account. And all my Windows devices recognize it in case I want to stream data from device to device.
The iPhone/iPod touches are very integrated into the Apple product landscape. Great for Apple users, not so great for people who do not own other Apple products that can integrate with it. iTunes does not work too hot on the PC. As an engineer, I NEED to have a PC; most of the software I need to run on my devices for data manipulation, formulaic calculation, complex math structures, and data acquisition are not written for Apple. Additionally, am I am very familiar with most of the command lines and advanced control services in Windows, and I have no reason to want to switch to Apple.
So to sum up:
Apple brand = higher price (paying for the brand, a brand I would have to buy from the ground up since I don't own any Apple computers)
Engineering software, much of cannot install onto Apple platforms.
My entertainment (Xbox) better integrated into Windows Ecosystem.
I am already very familiar with Windows higher level functions and command line structures.
And from a completely shallow perspective: I like the Windows UI for all of it's products. It's a preference.
Now, to focus in on the Windows 7 Phone again: with the new Mango update, the device is perhaps one of the most optimized devices on the market. IE9 renders beautifully on the phone (will be Hardware Accelerated and supports HTML5), hands free texting (Speech to Text feature) and I love the Metro interface. I could go on and on, but in general, it's the phone for me. Just like the Apple iOS is device style for others.