There is a charming restaurant in the West Village called La Focaccia that has the most beautiful patterned tile wall. Every time I see it I dream of redoing my kitchen like this.
Then again, tile is a pretty big commitment. Maybe the key is to go with a subtle and elegant pattern like the one in the 2nd photo. What do you think? Picture 5 is from a dollhouse but the concept is there. Would love to see that kitchen life size!