For me I just go for pumps. Now that I can actually get a pump since being on TRT, I am absolutely addicted to it.
Musclepharm Vasosport for non caffeinated (3g citrulline, 750 mg agmatine, 750mg arginine)
If I want caffeine I'll combine it with ON Platinum Pre which has its own 2g citrulline along with beet juice powder caffeine and DMAE
Those are the only supplements I fuck with now, aside from minerals (zing, magnesium every night) and of course protein powder to help reach daily goals when I can't eat enough real food.
Also some drugs:
10mg Cialis for veins gainz (and dick gainz later on)
50mg Proviron for more veins gainz, sex, mood, SHBG suppression (more free test from TRT), and added DHT and lowered estrogen.
About to try some.. other stuff.. in the new year