This is a great question. There was some discussion of this issue in a past post which asked about wearing scents at a funeral (would that scent take on the aura of the day, in memory).
I have some old warhorse scents that remind me of my younger days, but no traumatic memories associated with those times (aside from the realization that that was then and this is now...)
My current scents have no memory databank associated with them, so I'm in a happy and unique sort of situation of being a tabula rasa on this.
I'm sure many others will have some interesting comments, I look forward to them.