my first one: Shimano Sora 3x, aluminum frame. Still in use for commutes and bad weather rides.
the good one. Shimano 105, Rim brakes, aluminum. It just works and it well balanced. I the long rides, it’s actually the best of those three, even if it’s not the fastest.
Aero road bike, eTap shifters, discs, carbon frame and rims. I’m always anxious I could brake something to the point I can’t really enjoy it.
I actually thought about getting a triathlon bike too, just know how much faster I could go on it. Then again, I never even participated in cycling events anyway.