It does seem like more guys are sick with multi-ester tests(Susies, Omnadrens, Enhanced long acting/short acting blends) as opposed to straight Enth, Cyp, Prop, etc..
However...
Juicer Lesson #1 ~ Everyone responds differently!
Some people get zits all over their arms from Ganabol, another might get none.
Some guys grow like a weed from Abombs, other's don't respond at all.
Some guys get a golf ball sized welt and hurt for days from injecting vet grade Prop, others don't feel a thing.
Find what works for you and go with it.