I have one that points to the northWest... (which is to the left and up). when I'm 90% I'm straight and I look alot bigger than when I am 100% with the curve.. but then again that's from my point of bird's eye view from the top. I don't think from below an upward curve looks bigger either. So I would have to say, a straight or downward curve LOOKS bigger than upward.
however, I think upward curve feels bigger for girls. and it's definitely more difficult to deep throat... which in the size wars is a positive (while not getting deepthroated is the obvious negative).... It's just that I feel if a girl can deep throat you, she has owned your ass.... and my goal in Penis Enlargement was originally to attain a penis that even a cammel couldn't deep throat... (giraffes and Ostriches are welcome)