I have never been a PET fan since the constitution he saddled us with containing  no property rights and the "not withstanding clause"  that has resulted in so many human rights abuses in Quebec. His dandy son makes me cringe with his petty bourgeois attitude and his destructive policies.
 I have met a few of the candidates including O'Leary, Chong, Bernier. & Rait. All smart peoplebut, to  me, Bernier is the one who gets policy right and is also  the one who has the best chance of winning a National election for the Conservatives.
O'Leary's lack of French shouldn't matter, but it does in the real world so it matters to me.  I doubt that any of the candidates speak Mandarin, Urdu, Arabic & Hindustani . A candidate who could speak English , French plus those four fluently could probably sweep the country.