It's easy to do that. You love a band if you hear it, but they're bound to change in style and you don't always love that too.
Saves the Day, for instance, started with short, harder quick punk rock songs. Then they moved to rockin' emo, but mostly rock. Then it came to emoish rock. Their last was weird trippy emo, as if the band was on heavy hallucinogens while making their music. I loved their first three, last one wasn't as great.
No Use, I pretty much love all of it, except very early stuff, actually. I like Hard Rock and Betterness a lot actually, two of my all time favorite albums, I'm a big fan of the rhythmic rock in those albums. I also love Making Friends and Leche, they're a little more aggressive. Don't Miss the Train is pretty good, Daily Grind is bearable, and Incognito I can't listen to. Just not my style. I like the way they have evolved, although I could go for more of the energy in Making Friends.