Well, Ash will never end up with any of them because he's an immortal 10 year old...
But I'd have to go with Advancedshipping, I don't care if you think contestshipping is more likely (I don't think i'd last long if it ever did happen).
Anyway, Ash taught May everything she knows about Pokemon (she used to be scared of them), and he saves her a lot (which I think is cute) xp
Ash grew more mature with May because he had to teach her everything, and watch over her a lot. They look cute together (especially in the 9th movie!).
Plus I think it's super cute how May keeps the ribbon that her and Ash won as a good luck charm in Johto.
I don't mind Pokeshipping. Yes I've watched all the episodes since the beggining... I really didn't like Misty at first - I thought she had rage issues. But she grew on me xD. While I do think Ash probably looks up to her as a rolemodel and most likely a big sister, I don't mind it if it did become canon.
And Pearlshipping... is cute at times but I think it's a bit boring. But I do think they look cute together.