Look at the Lampard Gerrard thing. (I'll get stick for this...) Lampard was a decent player who realised close to 100% of his talent (which is unusual), Gerrard was a guy who had spectacular moments or influence in big games but never came close to realising all of his (and helped by an indulgent fan base who thought the sun shone out his Arse). I know which one I would prefer