The story in episodes or series that involve characters "Swapping" bodies is generally poorly done and I find myself unable to "Get into" them. I think if they had better stories, they'd be more interesting to me, but generally speaking the majority of Body Swap encounters take place in a single episode where it's more or less a distracting adventure from the main plot. These types of encounters are among my least favorite because you become invested in the series and want to see it continue. In other words, they are more or less "Filler" episodes.
If you're interested in body swaps, I suggest checking out TVTropes. You can find a list of just about every situation in which a body swap occurs.