Hey got a sale yesterday on pr15 so would like to add that on to the list of good servers. I know this probably won't be the same for everyone but the servers i avoid are. PR16, PR18 and PR26, 17, 23, 3, 2, 27.
Couple of other things no matter what method you use to upload please check every file by trying to dl it. I have noticed rapidgator randomly reassign some file to crap servers. Also if you are uploading a file and no matter how many times you try it keeps going to the same one then rar (vice-versa) the file or change the name and it should work. I would recommend double rarring the file rather than un-raring a file.
Also the PP thing is paypal blocking loads of accounts however i think it has to do with filehosts that use PP to buy accounts ala extabit. Not ones that only use it to payout.