I can relate. Although I dont have a real piano, I write songs on my Korg pa500 or even my cheap Yamaha keyboard rather than using my pc because they have built in speakers. Just hit the "ON" button and youre making music and the sound is coming from the keyboard itself which feels more intimate and real.
I always record using midi but for writing, I find there's somewhat of an emotional disconnect going thru the computer(no matter how good the vst). It just feels more cumbersome and distant. For writing, quick & easy is usually the way to go.