Thanks everyone for the comments and suggestions.
I've heard that Manila isn't much cop so the idea was 2 nights there on arrival (don't land until 00.45 though, gives me a full following day and night to see the place and get the fridge magnet), then head off elsewhere, probably to Boracay where I've held a hotel for 6 nights. From there I was thinking Bohol for 5 nights but that would mean flying into Cebu and possibly having to stay the night there which doesn't really appeal, so I might have to re-think that (there is an indirect service from Caticlan to Tagbilaran but again that doesn't massively appeal logistically) It's this 5 night window that I have a pretty big question mark against at the moment......
I'm gonna have to do 1 further night in Manila at the end as I fly home early, but I'll just do an airport hotel for that.
10th - 12th Feb Manilla
12th - 18th Feb Boracay
18th - 23rd Feb ?
23rd Feb Manila
24th Feb fly home at 06.30.
Would love to squeeze in a few more days but sadly just can't do it with work :(