I've been having lots of fun with Loadout recently. It feels like a third-person TF2. I like the customizable guns. My biggest issue is that too many of them just suck. You can spend 20 minutes swapping parts in and out and get something that just blows. And this is the norm. I get that they don't want to have too many overpowered weapons, but I think they need to raise the floor a bit. Also, parts are expensive and while you can get them through normal play, the game will very quickly move towards pay to win.
Anyway, it's $10 for early access, and F2P when it launches.