It depends a lot how it is done. I do enjoy playing multiple characters as I feel like it makes it easier to make the world feel more alive and it brings more depth to the story when the main characters don't live in a vacuum.
However what I've often encountered is when people want me to play a harem for them, where they only play one character and want me to play tons of others surrounding and all wanting their single one. I don't mind the thought in sexual sense, but more often than not it also leaves the whole story building on my shoulders where the only thing they bring into the scenes is how they fuck the different characters I play for them, and even then, they mostly do it the same way with all of them