I see a lot of people recommending the big names, but have you tried DuckDice? It's more focused on dice games, but the community is great and the payouts are solid. Plus, their faucet is a nice touch if you want to play for free sometimes.
I'm surprised you're the only one who mentioned the emotional toll. Poker can be incredibly stressful, especially when it's your sole source of income.
WillyA, are you prepared for the psychological aspects of going pro?