Play when you can and enjoy yourself.

If you're asking because you've got a well known character that others depend on that you're not interested in due to like..pk range and you want to play something else, thats different.

If its literally just you have random times to play because of life, who cares, play what you want.

I think there's a current caballed character that's been leader 3 different times because of his availability coming and going.