My seat was in the back, row 25. Understanding that to be heard over the engine noise, one must speak louder than normal, the flight attendants were conversationally too loud. I realize that, of course, they should have conversation, but theirs was accented by outbursts of laughter and overly animated to the point where I was awakened from a deep, much needed sleep. When going to the restroom, I mentioned this to them, The young man gave me an irritated response. This was unprofessional. Please give the attendants further customer support training. One of the young lady attendants had her shoes off with her feet up on the bulkhead. The atmosphere was too casual and inattentive to passenger needs.