I am hesitant about putting too much money on it. So I don't use PayPal as much these days. My concern is that PayPal can and has taken over accounts before, due to terms of service violations that they never say what for. And then leave you with a 180 day wait or so, until you can cash out your money. That is unless PayPal hasn't found a reason to take that money.
Never hold money on PayPal, don't use it like a bank ever. I know that's not easy for everyone to do, but if you can, get a bank account so that when you do get paid on PayPal, you can transfer it over to your bank account. Because, if you are ever locked out of PayPal, you have to go through hoops just to get your money. I've heard some horror stories about PayPal and due to that, I always cash out of there right away and never hold money on there.
I did have a PayPal prepaid card that worked like a bank, but I'd advise even against using that as a bank, as it's not a banking service. It still requires you to sign into your PayPal account, so if you ever get locked out, it's probably the same situation.
So to make it short, PayPal is great, so long as you don't hold a lot of cash on there. Otherwise, find out how to get a bank account and connect your PayPal to that, and cash out as soon as you're paid. Because you never know when PayPal might come down on you with some terms of service violation and block you from using your account. And they won't tell you what the violation was, as their actions are always final.