if you want b2b sites, this site is an absolute must:www.b2bheaven.com
most b2b's have 10x clearances though, so they aren't great. if you make sure to do a site with a large bonus within a month, and so combine it with their loyalty points, even a 10x bonus can effectively be 7x-8x since the points get triple-usage. (let me know if you need detail on that)Doyles room is meh. not really the best at anything.Absolute skins are probably the best if you combine it with rakeback. I don't know if the skins do that too, but if so its almost certainly your best option.Ongame has a few good skins. their 5x and 7x bonuses are definitely worthwhile, though once you get up to the 10x ones its marginal. if you play NL its a pretty good option though.If you haven't checked out the Cryptos, its a must. Interpoker has rakeback and a $100 5x bonus each month. Poker Plex just increased its bonus to $200 at 5x. Sun Poker has rakeback and 5x bonuses. William Hill pays 5pounds/hour up to 25 each month, which is a must. Several others have 5x bonuses as well (check out BW for all the sites).
Long signatures are really annoying.