Your paypal account is seperate than your ebay account. You won't need to close paypal if you get a new ebay account.
That feedback thing is kinda messed up isn't it? I have wanted to leave a neutral or negative before, but I know if I do, they will do the same for me, isn't quite fair is it? Also, I think seller's should leave feedback when you finish your end of the transaction, not wait for you to leave feedback for them first. I mostly sell on Ebay, occassionally I will buy...but in my seller's mode, I always leave feedback for my customer's when they have finished their part (paying

). I think that is the fair way to do it. I have seen where ebay will withdraw feedback if both parties agree...however it remains there for all to see...it just says feedback was mutually withdrawn
That's a shame though you can't leave a neutral with the truth without fear of reprisal