I dont curve my Bakugan as much. I set them down so there resting peacefully and then I push with my knuckle area. But my all-time best roller (Shadow Vulcan) I curve around so he goes in like a circle onto the gate.
Funny you'd mention that, in some places (I guess on slight slants) I can roll Cosmic Ingram around the field, its so useless but its fun to watch.
I know. I could do that all day.