I like the MediaElement player but it'd be nice if it were more easily skinned. Or at least, if it could be altered so it's really obvious that, "Hey, this is how to listen to this podcast episode."
I made my own modification thru PowerPress CSS and you can see an example
here.
My thinking here is, embedded video players have become so ubiquitous that anyone can look at them and understand how to use them. But I think about people I know who aren't very tech savvy who might go to my podcast website, see some shownotes and then an embedded audio player with a play button. Will it make sense to them what the player is for? I may be overthinking this but I do have friends that aren't very tech savvy and I try to look at these things thru their perspectives.