It would be brilliant to meet you in London. Are you planning to attend the meet up?

As far as the pay-it-forward, I'm alright with whatever you'd like doing. The pairings I love in pjo are Solangelo, Apollo/Zephyros, and Reyna/Rachel. In hp I do love Slytherin house, but the others are nice too. I prefer Harry/Draco if you want to do a pairing, but I'll really love anything you choose. :)