I use both Draft Kings and Fanduel. I am sticking to those 2 for now because they are the ones with the biggest financial backing, getting huge amounts of funding from places like Disney,
http://fortune.com/2015/04/06/draftkings-and-fanduel-close-in-on-massive-new-investments/. I feel like Draft Kings and Fanduel have enough money behind them for my money to be relatively safe.
If you have never deposited before, rotogrinders.com has a code for 100% bonus up to $200 on both sites.
As for the offerings of those 2, payouts depend on what you want to play/risk, both sites offer similar game types. Tournies are the big lottery ticket items with high top end payouts, but also high variance. Cash games and 50/50s are less of a roller coaster ride, but you won't have a chance at that big pay day. Play the game that are most comfortable at.
Fangraphs recently had an article about the differences in the scoring systems,
http://www.fangraphs.com/fantasy/differences-in-daily-scoring-systems/ . Depending on who you like to pick up that could help your decision.
Also, be aware that while there are a bunch of bad players you will be playing against on those sites, there are also a fair share of people playing DFS for a living. A lot of poker players have joined together to pool knowledge and develop advanced strategies for DFS. So play for fun, but if you want to make some extra money, invest some time and do some research.
This post was edited on 4/9 11:05 AM by SouthJerseyRU