These are the Voyager episodes I re-watched:
"Unity"
"Scorpion", Parts I and II
"The Gift"
"Day of Honor"
"Revulsion"
"The Raven"
"Scientific Method" (it's not a key episode but it does put a nice cap on the opening episodes of S4)
"The Omega Directive"
"One"
"Hope and Fear"
"Dark Frontier", Parts I and II
"Someone to Watch Over Me"
"Unimatrix Zero", Parts I and II
"Human Error"
"Endgame"
I skipped over the Hirogen Arc and cut all the way down to the bone with S5-S7 because finishing all of TNG before January 23rd was my priority, but now I feel like I can go back to watch some other Borg/Seven episodes that weren't on this list.
"Unity"
"Scorpion", Parts I and II
"The Gift"
"Day of Honor"
"Revulsion"
"The Raven"
"Scientific Method" (it's not a key episode but it does put a nice cap on the opening episodes of S4)
"The Omega Directive"
"One"
"Hope and Fear"
"Dark Frontier", Parts I and II
"Someone to Watch Over Me"
"Unimatrix Zero", Parts I and II
"Human Error"
"Endgame"
I skipped over the Hirogen Arc and cut all the way down to the bone with S5-S7 because finishing all of TNG before January 23rd was my priority, but now I feel like I can go back to watch some other Borg/Seven episodes that weren't on this list.