Honestly, more-so my only bad experiences were no positive effects after using some bunk gear.
Everything else I have tried, I usually stick with - tried and proven.
Such as:
Primo (Enanthate), Mast (Enanthate), Test (400, Enanthate, Cyp, SUS250, etc...), and Tren (Enanthate and Acetate).
Orals:
Anavar, Winstrol, Proviron, Dbol.
No need to reinvent the wheel, just be sure to buy from reputable places and take advice from those that have proven experience on the forum.
Also, incorporate proper supplementation to protect your organs.