Like I said, I am fairly new to actually running a cycle myself, but based on what I have read it really depends on you and how you react to it. Start out like I did with a short Test Prop cycle. Prop is the shortest ester, so sides are most likely minimal and you can get it out of your system quick if you do have said sides. Then gauge how it worked for you and go from there as far as if you wanna switch, stack, or stop. That is what I am doing/did. Honestly, I can barely tell the difference sometimes until I am in the gym, or realize the increase in libido. I guess injections sights are a little more sore with Test Prop than Test E, but I just do delt when injection days land on leg day, and glute when injection day lands on arm days.