I used to practice scales, but I think mainly in positions. I do runs that go from position to position, basically around chord shapes. I can get around pretty easily from one position to another, and on a good night it sound pretty hot. I'll take chances. Sometimes I'll trip over myself, but most times I'm lucky.
Denyer, Ralph (2002). The Guitar Handbook. p. 140. ISBN 0-679-74275-1.