After using desktops exclusively for over a decade, I went exclusively laptop in 2012. It was alright, and while laptops were able to fill most of my needs (they were all 15" high end models), there were always times here and there where the limitations inherent to being a reasonably portable laptop reared their heads, and it was always frustrating. Just a couple months ago I built myself a new tower and now it's where I do most of my free time computing, and it's really great to not have to deal with aforementioned limits.

It's also just staggeringly more powerful than my laptop. My tower compiles projects in Xcode 2x-3x as fast as my top of the line 2015 15" rMBP, and that time saved really piles up.