A couple of friends who are a little older than me and who grew up listening to Rush swear by the early albums and both are massive fans of Here Again. I like it a lot, but it didn't make the cut for me. I love the solo and it is definitely one of those "they never did any other song like that" instances, but I feel like the production wasn't as sharp as it should have been for that kind of tune on the debut, as opposed to the rockers, all of which sound really good.
Overall, I like the debut, but I rarely listen to it, and whenever I think of the best debuts by any artist, this one never comes to mind. Some bands crushed it on their first album (Boston, LZ, VH, etc.), but I don't think Rush was one of them.