"You are all INDIVIDUALS!"
"Yes, we are all INDIVIDUALS!"
...

Seriously, the way to play Bach starts with analysis. First one voice (horizontal). What is the motif? Where does the motif culminate? What musical parameters (e. g. melody, metrum, rhythm, articulation...) will you use to denote the arc of the motif? Where are the countermotifs? What musical parameter is the basis of contrast between the two? Which parameters will be static (e. g. stay the same with each repetition of the motif/countermotif(s)), which ones will you use to provide a "plot" to the voice (will you keep the articulation and strucuture of dynamics the same and vary the overall dynamic levels, or will you be toying with articulation, perhaps even try shifting the points of culmination within the motifs?)?
Then the voices together (vertical). Where is the important thing happening? Yadda yadda yadda. Lots of thinking, both at and away from the piano.
Then fingering. Can't stress this enough.
I hope this helps. Have fun.