I actually enjoy the relax attitude of DJ compared to QF and DJ is my preferred airline, especially after recently watching QF FAs doing the manual part of the safety demo (mask, life vest and exits) and if ever there was someone who did not want to be there, they certainly did not hide it. Give me fake smiles, hand waves and bad jokes anyday!
On my last QF SYD MEL I managed to be snobbed by 4 different FAs walking past me, whom all failed to notice that I was not served breakfast (they served the rows in front and the last row behind me

), pressing the call button didn't work as I was continued to be ignored for the next 5-10 minutes until I literally jumped in one of the FA's way, and the response was 'Oh cough, we missed 1' to another FA, not even an apology.
Having done both Y+ on VS and SQ J earlier in the year, I found the VS crews were certainly more relaxed, which I prefer more.
In the end, it's each to their own I guess, some may say unprofessional just cause they try to convey essentially the same information and complete the same task in a different style, I think the tasks was completed just as efficiently and to me, that's professional.