I remember being sad when Gen 1 Bionicle came to its end. I had been following its story since it began, so I didn't want it to end. Being on BZP at the time did help ease that pain though.
For Gen 2, I wasn't as sad to see it end. I didn't want it to end, but it didn't hit me as hard. Though that's because I wasn't as invested in the story of Gen 2 as I was in Gen 1.