"In present-day English combinations of the progressive and adverbials of frequency often convey connotations of annoyance or irritation... See page 19 here [Tim Romano]"
In American English, a great amount of time followed with -ing or a continuum , often presents annoyance, exaggeration,complaints or irritation.
For example:
-You're always using the word like.
-You're forever forgetting to emphasize the swells.
-That dog forever barks when I get close.
-Why does she always look at me like that?
This is often how the progressive is used, but it's not a definite rule. The context usually makes it clear why you're using always for emphasis.