The roll thing may seem trivial but good service is built upon consistency. When you consistently have your choice of your favorite roll then suddenly don't, you notice it (as is evidenced by this post). That shouldn't happen.
It's one of those things that a first time CO flier might consciously or subconsciously take notice of. All of the little things do matter.
In defense of the FA though, the bread basket and/or tongs may have been left out of the catering supplies. This happens from time to time.