Most all standard racing frames built in the last several decades have head tube angles between 72 - 74 degrees. Fork rake works with the HTA to determine trail - which ranges from 5 - 7 cm. This range has been determined imperially and has held up to the test of time.

Chain stay length has a small effect on weight balance on the bike, and bottom bracket drop has a small effect on center of gravity placement. Again, common range for frames is quite tight because it just plain works.

One small Nessism I'll though out is somewhat controversial; I contend that a bike with a low bottom bracket will steer faster than one with a higher BB. The low BB lowers the center of gravity and moves said CG closer to the roll axis of the bike - thus making it easier to turn and lean.

Enjoy your research.