if we were playing the terminator ranking game I'd go:
Terminator
T2
T3
TSSC
Genesys
Salvation
I actually like Terminator Salvation so i wouldn't put it bottom of the list. I think that bottom of the list definitely has to be Genisys. Effects driven drivel minus a good plot which most movies are nowadays unfortunately. My list is:
Terminator
Terminator 2
Salvation
Terminator 3
Genisys