Nothing wrong with electric bikes, I just don't like that they are being positioned as bicycles.  The earliest motorcycles were essentially engine-assisted pedal bikes after all.  
I think there's a lot of potential for them.  They are environmentally friendly, largely zero emission, quiet, efficient.  For commuting and utility there's a whole ton of place for them.  But recreationally I guess I just don't see quite the benefit over fully human powered bikes or existing motos.  They are either over powered MTBs or under powered dirt bikes.  I dunno.