So far for me my favorite by far is mast prop, it makes me feel great and driven which in turn helps me push myself harder. Many other compounds I just don't feel great on and it really isn't worth it to me to feel like shit for extended periods of time. Two that come to mind are primo e and NPP, I feel poorly on them mentally which then effects everything else in turn. What compound is your "feel good" compound? Also do you notice that different esters effect you differently, for instance mast p vs. mast e (pinning daily). I'm looking to try a bit of everything to find what works best for me, so far it seems that something someone else loves may be something I hate and it is awesome how we are all so unique in how we respond to these compounds. I do wish I responded better to nandrolone but I'll have to find an alternative to grow with.