Thanks.
Roxas - The establishment candidate. His grandfather was a previous president. Very rich. Lots of experience in Government but given this includes reaponsibilty for the disaster of Manila airport, the disaster of Manila traffic, the disaster of Manila public transport and the poor and slow response to typhoon Yolanda this does not really work in his favour. Does have all the establishment money and machinery. Would be a safe pair of hands but continued inaction likely.
Poe - I liked her. Clean it seems but has created doubts by being supported by some dodgy characters such as Estrada, a corrupt former president who was kicked out. He is her godfather. She is also friendly with the Marcos family. Her biggest problem with the voters is that she renounced her citizenship to become American then later retook Filipino citizenship. Doesn't worry me but strikes people as showing a lack of loyalty to the country. You also have the issue then of the bad history between the two 'allies' and her being accused of being an American stooge.
Binay - former VP. Corrupt as shit. Enough said.
Santiago - very intelligent, clean, very popular with students. Unfortunately she has cancer and comes across as very ill and weak. A few years ago she would have made a great president. Also she for some strange reason chose Marcos as her VP candidate.