@dabee: No you don't have to read any of the other titles if you don't want to. Everything that happens to things relevent to the character you are following happens in their solo series for example. The Bloodshot Vs Toyo Harada fight took place both in Harbinger Wars and in Bloodshot just from a different perspective. Valiant print their comics so you don't have to needlessly spend money because the character you like appears in another series.
Alright, thanks a lot. That's a huge help. But it's not that I don't want to, it's more that I'm just not sure if I want to add 6+ more titles to my pull list.