Pinnaclesports & sportingbet were always my favorites, for their fast payouts and increased betting options available. That is, before they stopped accepting wagers from U.S. players. Thus, if you're not in the U.S., they're the first 2 on my list. I know sportingbet is publicly traded on the London stock exchange. I'm not sure if pinnaclesports is publicly traded or privately held. I do know if the sportsbook you use is publicly traded, then they will comply will all laws, openly disclose information (including financials) without misrepresentation, and will be reputable, professional and dependable.
Safe to say that any online sportsbook that still accepts U.S. wagers, is not a publicly traded company, and one should use cautiously.
Betjamaica pays out the same day, and is one I'd recommend. I did have an issue with their customer service, however, that issue was amicably resolved. They also accept phone wagers for $10, for those that like to bet small.
Bookmaker has many money lines on games to choose from, and is one of the first to post lines and make them available. They offer decent bonuses and courtesy entries into blackjack tournaments upon making deposits. And, you earn points on your action that can easily be converted into free bets, free gear and/or other nice things which shows me great appreciation for my action. I'd also recommend Bookmaker because I've never had any customer service issues with them.
Sportsinteraction, Betphoenix, Betonusa & Bet365 I have used sparingly in the past without any issues.
Wsex I had used in the past, and always got my payouts in a timely manner. Though that was back in the Neteller days. Other than getting paid promptly, I was never too fond of Wsex because of their high cost of juice, lack of betting options/lines, and funky website. They do offer those buy/sell options which I have yet to figure out.
Though I have never used TheGreek ,Matchbook & 5Dimes, I'd like to as I've heard mostly positive feedback, I think I've tried to use them, but I had sign-up/deposit and/or site issues if I recall correctly.
2 others that I no longer use, one I'd like to because I never had any issues, is Vipsports which I think is gone or got renamed or merged or bought out or somehing. The other is bodog, which I wouldn't ever use again even if they were the only online sportsbook in the galaxy. Bodog is by far and without exception the absolute worst online sportsbook currently available. That is all, unless you want to read the details in the other threads.
I've used several others in the past too, like Sportbet & Sportsbet and my use was sparingly, and nothing good or bad to report on them,