Started with Magento1 in 2012 with zero PHP experience and a website filled with core hacks due to lazy/incompetent developers (thanks EIGHT25MEDIA, initially I was just database entry stuff).

Now (Summer 2016) building our new Magento2 store, entirely in-house this time. While a relatively low-traffic niche store, we sell a range of products which require extensive customization (from postcard like items, to paint gallons, and truck-freight only items).