Hello extremely logical artist! I too am extremely logical. And logically, i can tell you it doesn't mean a thing, lol. Creativity's based on both sides of the brain. The way to go around being wild and free spirit is to use your logical ness to be regimented and disciplined. Have set hours set aside for sketching, throw out all your goddamn graph paper because you are not a dot-matrix printer composing your dot-matrix symposium. Just...fucking burn it. No! Bad lefty. Accurately think about what you've done.
Centra and I were actually discussing this a few days back. She is very right brained...creative brained...whatever the normal one is/ and I'm more logical and planned. And there are pros and cons to both. I have trouble being spontaneous with my images. I like knowing what i'm supposed to draw, and i've got enough training to relax a little and draw whatever, but for the most part, I get a subject, I have good methods on figuring out what a customer wants based on how they talk about their description, and I'm able to fulfill what they want with a pretty high mark of accuracy. No, i can't just...start drawing some sort of beautiful nothing-thing and it turns out amazing and I call this new creature "the fluffernutter" on a whim, but I can combine and play around with biological forms i've learned to replicate, mixing things more like a recipe. And as a benefit, I don't have to wait for the right type of whim to hit me to be motivated to draw. I don't get artblocks. I get...art downgrades that I power through then come back better a month later.
The thing i saw with most of my stereotypical right brained friends (ie, collegue hipsters) is they had a hard time doing assignments. They didn't like being told what to draw (to the point of just quitting the program) they relied too much on what they wanted to see, instead of listening and responding to what the instructor wanted from them. And honestly, the vast majority of them didn't do anything with their degree after college, and a large portion of them don't have a job right now. I don't even think they paint, for the most part, they'd tell me how the teacher "spoiled" their want to draw. I had Jon Foster tear my portfolio a new one and tell me my stuff was shit, which parts were shit, and I just nodded and went "Okay! I'll fix it" then had my friends consoling me afterwards like Jon Foster spit in my face and I shouldn't give up on drawing. I had no inking to ever stop drawing or consider my career over, so i was sorta baffled why they'd think i'd be so upset. It's literally a fantastic benefit to be stubborn and disciplined. As your logical self will tell you- if you keep practicing, you will get better, and you will succeed eventually. And it's right.
So fuckin' rock it, friend!