The office of Uachtarán na h-Éireann should be above reproach. It got sullied in my opinion when one of the former Presidents refused to dissolve the Dáil on request, blatantly playing party politics, when she was lucky to even be elected.
As I said in the David Norris for President thread, the office is ceremonial and representative and needs someone who is prepared to accept that as opposed to someone who thinks they will be Ireland's Barack Obama.