I think people want to know what to do and what is considered normal. I realize no situation is the same, but most people want to do the right thing and not undertip or overtip. That's where Cruise Critic and all of you who know so much come in handy so much. I can't speak for everyone, but it is so very helpful to us and I don't know what we would do without all of you helping out.
Just a little tidbit, when we were so young and it was the first time we traveled anywhere, we went to Jamaica and at the airport, we had one bag, the bagger took our bag (that was after they searched through our underwear--never knew that happened) we never asked him to take it, but then he put his hand out to my husband and my husband shook his hand and said thank you. Friends we were with took care of the tip and let us know in the cab how things worked. We were embarrassed. We just didn't know better and there was no internet back then. LOL Hopefully some good laughs. We still talk about that! So, yes, we make sure we tip! I think people ask questions here to know what is the right thing to do.