I have played enough F2P games, don't want to do that ever again... the P2P ones are always better quality, first off. Then, with F2P games you can tell who is putting money into the game and who isn't. Those who don't pretty much always end up looking like ragtag "would-be adventurer" farmers... while the ones who have a lot of money to sink end up looking UB4R! (That's UB 4 R, not 3 R, because it is one step above! and yes, sarcasm)...
Right there, you create an extra level of animosity between players that isn't needed! And it ruins the game, it ends up with the unofficial title of "P2W" because those that pay end up with everything, and those that don't pay have to work 5 times harder... The F2P model has done nothing but empower and enable young immature people into being old immature people. They won't work for anything, they want to be able to BUY their gear and get places just off of money... the P2P model says everyone is equal in their eyes, and everyone MUST earn their place in the game world. And yes, that cuts a lot of people out of the population, but honestly, those are people I don't want to hang around with anyways. So no, P2P please.