Petzy, its all up to you. Personally I like to know what's going on with my body....that my cycle's are normal lengths...my LP is long enough. And to time BD instead of just guessing.
But for me, I don't want to waste time. I want to get preggo ASAP so it works for me. And since I've started, I've learned SO much about how my body works...it's pretty awesome. I check my cervix & cervical mucus too. So I know when I'm peak fertile. I know based on my cervix if I'm at my peak & after which point I'm no longer. It's super neat.