High-quality tailoring is my favorite hobby. I love to make quits and tops by hand. 
How did you learn how to tailor?
In the army as crazy as it sounds. When your in the field you have no one to attach objects using stitches so you learn. 
And how did you go from functional sewing in the Army to quilting?
PTSD. Quilting helps me relax. I love sewing two or more layers of fabric together to form a beautiful pattern. It helps clear my mind. 
I recently started knitting to help with anxiety actually. I just finished my first baby blanket. It feels great to make something. 
I want to learn to knit but I have trouble creating the multiple loops of yarn or stitches needed. 
I think tailoring is probably more functional anyways. Do you make tops for daily wear or something fancier?
I've made a full suit and also over coat out of the same material. 
Wow! I bet that took forever.