Me or my?

[Molly]

"My roommates are rather concerned about me/my dancing."

[Alan]

Hi Molly,

The two sentences have different meanings:

'me dancing' refers to me personally, in contrast to anyone else, dancing.

'my dancing' refers to the way I dance.

Alan
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[Molly]

But the "my dancing" is my dancing in contrast with other people's dancing, right?

[Jamie (K)]

[My roommates are concerned about me] [dancing].
= My roommates are concerned about me when or because I am dancing.

[My roommates are concerned about] [my dancing].
= My roommates are concerned about me when or because I am dancing.
or
= My roommates are concerned about the dancing I do.

[Molly]

<[My roommates are concerned about] [my dancing].
= My roommates are concerned about me when or because I am dancing.>

If, as you say, that is sometimes equal in meaning to "me dancing", what's the guidance on usage? In which contexts should each form appear?