question regarding hsv 1 reinfection

If someone has hsv 1 already, and occasionally gets a more mild-looking outbreak here and there, as many do, is this person essentially protected (via antibodies) from getting a "worse" or "harsher-looking" or different form of outbreak if ever exposed to someone who tends to manifest the virus in that harsher-looking or different way?

In other words, I have seen that these outbreaks on people's lips and faces seem to appear in all kinds of different ways, some very harsh looking, some very mild, but definitely different.  What determines the variation in this virus' expression on so many different people if it is just the same virus acting out in everyone? Is it just the person's immune system strength?  their genetics?  or is this medically unknown?

[gracefromHHP]

From what we know so far, the different strains of hsv make no difference as far as the number of ob's or the severity of recurrences. Even in folks who have multiple different strains of hsv, they don't have more ob's or anything of that sort.  

It has as much to do with our own bodies and our genes as anything as to why some folks get whoppers of cold sores or get them at the drop of a hat and why some folks are infected and never get cold sores or just get relatively mild cold sores.

grace