Seasons have chapter objectives for things to do. When you finish chapters 2-4, they give you an item you can redeem on any character which gives gear for a full set. You can get these items once per season for the account. So best used with a class you know you're gonna stick with for a while.Wait what is season set and what do you mean by free?
What is good class to invest time on?
Also can the host kick me out of the party in quick match?
I feel like im being kicked a lot from the host ,but it says it disconnected.
As to kicking, I haven't seen that option... and I've tried to find it for some of those random people who join and then just sit in town. When you've disconnected, did you notice if it says the host left and you were being migrated to a new host? That's most likely what happened, happens all the time to me. Pretty much sticking to making my own groups from here on out. Wish the game had some dedicated servers to remove this problem but it is what it is.