I've read all the science on creatine myself, but I gotta go with how my body personally reacts to it.
I can take 5 g's and it works, but if I take 10 or more per serving, I definately see more benifit. Particularly if I'm off of it for awhile. I like to take about 7-9 gm's per serving, usually twice a day. Once in the morning and once after I work out. Sometimes I'll take some before I work out. I'm constantly changing the way I take it to see whats best. I've been trying something different in the past two weeks.
I've been going 2 days on, one day off, two days on, one day off with my creatine, but I've been uping the dosage to 10 grams. I've gotta say, it's working awesome!!! It's like my loading stage, only ALL THE TIME!
So far so good, I'll keep posting how it goes.