Could somebody please tell me which sentence from each of pair is correct/better. If both are correct could You explain me that subtle difference in meaning between them.

I’ve been playing tennis in many clubs.
I’ve played tennis in many clubs.

I’ve been avoiding her ever since I met her in 1985.
I’ve avoided her ever since I met her in 1985.

thanks a lot

well, both are correct; b as far as I know the only difference is:
Present Perfect Continious shows emphasise

The first (I’ve been playing tennis in many clubs.)seems to indicate that you continue to do so.  It is ongoing, and you rotate among the clubs.
The second(I’ve played tennis many clubs.) Can mean the same thing, however, it can also indicate that you no longer play the game.

The second set of avoidances is the same. ,