Holy hell, I feel like I'm finally "getting" it in Bloodborne now, though. Took like 2, 2 and a half hours to UNLEARN Dark Souls 2 reactions to combat.
Can't be overstated enough: You have to be an aggressive motherfucker guys. If you get hit, don't dodge or roll or runaway unless you absolutely know you're going to get hit for fatal damage; take it, and get that health right back by using quick attacks. As long as you do this and nail the timing on parry big enemies, you'll breeze through the (early) areas I feel (there are some nasty enemies that don't show up much you have to be wary of though -- steer clear from "unique looking" things until you aren't holding on to too many souls. Or whatever they're called now.