I did not enjoy dungeon mastering D&D 5e. There were a number of factors involved:
- I personally did not enjoy the extra time it took with the rules out of game to plan encounters, etc. That's just me. I would rather have spent my time on more creative aspects of the DMing. I am sure that with time, this aspect of the DM experience would have changed for the better.
- Dungeon combat became both more complicated and less interesting with 5e. I quickly noticed that there was a blandness to encounters as every PC was able to take some sort of action almost every turn. Often, it didn't seem to matter what specific type of attack was used by the PCs. Each option seemed to have about the same chance of success/failure and did about the same amount of damage, whether melee, missile or spell attack. Lots of options every round for players but the effects of those options felt very generic from the DM perspective.