Wilco has changed their sound COMPLETELY over the last few years. Whereas intially they sounded like a cross between the Replacements and Gram Parsons, now they are much more experimental in their sound, and arguable a bit darker in their lyrics.
Many people who didn't like their initial sound totally love what they sound like now, and many alt-country fans who initially loved them think they sound like shit now.
So in this case, first impressions really shouldn't be applied to what they sound like now.
No offense but I still don't see you liking what they sound like now.
Ministry is another example of a band that totally changed their sound. Started off as wimpy sythn-poppers, and changed into a hard edged thrashy style band.