A traditional bike will be the easyest to ride. Especially as a beginner. Dual sports are a little taller but are nice if you have to, or want to go off road.
Get something light, easy to maneuver, and that if it hits the ground you won't be overly upset. After a year on it, then trade up to something more.
On that note, I have a sweet drag harley that I want to sell.
