It seems I'm not good at diffusing yet...
I put a section of my hair in the diffuserbowl, brought it up to my head, put the dryer on, left it there for 30 seconds, put the dryer off and repeated that with every section until 80% dry.
I didn't get more curl definition but it just got more messy.
I will however try again when I don't have a lot of time, but for now, when I have the time to let it airdry I will not diffuse.
@kathysmack: I find it really difficult to determine my hair properties with every site. I keep on doubting between low and high porosity and fine and thick hair.
I already have considered sending a bit of my hair in to the hair analysis thingie from livecurlylivefree but 1) it's a bit expensive for a student who doesn't work yet and 2) especially: I live in Belgium, so shipping costs would probably be high and also, I noticed that where I live, post packages tend to disappear..
However: I posted a topic on the low porosity board with a description of how my air acts and what is strange about my hair... But nobody answered yet