first time- compact long wheel base with over seat stearingfor speed- short wheel basetouring-long wheel basewhether proof-velomobilestabiltey trike- (delta)fun-(tadpole) hope this helps
There's really no set answer to that, it'd depend too much on personal preferences and conditions. You might as well ask about the best color, best band or best candy.
There is no such thing as a best bike. Different bicycles are made for different purposes. For instance even the best racing bike will not be suitable for rough terrain riding. You need to decide...