This is so interesting to me because I had the opposite reaction. Exactly the opposite reaction.I always found the pre-VOY Borg scary,

Then the Voyager Borg came along and brought me menacing, holding my breath scariness. I mean 'really' scary. But the kind I enjoy. LOL
The Hirgon are so scarey to me that I avoid those episodes almost completely, which is also interesting to me because I've talked to people who enjoy them without being scared or whatever. I mean, of course they see them as baddies, that's a given, but they hold no fear factor at all for them. Me? TURN OFF THE TV scared.

I wish I could also see what you see in the Pre-VOY Borg. I think I would enjoy that.