bit of fun I think, things that you've become an expert in since transitioning.
For me theres a few things, make up, well for me at least.
I know what suits me, what colours, shades, styles, when to relax it, push it, have fun with it or go basic. What to wear for meetings or catch ups.
Clothing, a lot of my friends come to me for advice, they all know I'm a clothes hoarder, so a lot of my friends will come and grab something every now & then.
Cooking. Most of us think we can cook, but boy I can really cook. pastas, lamb, beef, thai are what I do really well.
Most of it is self taught, but I have cheated with some things, a friend of mine family has owned an Italian restaurant for about 30 years, I have Mamma's cook book and over the years learned everything in there & added my own touches.