Well I was looking for an option "none of the above" because I normally have zero problems at the table, the only problem I have is the excessive time I still spend (probably without reason) as a DM to prepare before the game.
But since I wanted my vote to affect the statistics, I votes "personal issues" because at least last time one of the players' kid wanted to go home and caused our game to be cut shortly, and that's it.
I am especially amused by seeing that "personality conflict" and "playstyle conflict" are topping the chart. I associate both these problems pretty much with very opinionated players i.e. people who spend too much time talking about the game online, endlessly theorycrafting or imagining playing the game and finding issues before they actually happen, and then eventually bring their strong opinions at table causing detriment to other people's fun. This makes me once again happy that I choose not to play with anyone who is an opinionated gamer.