As with all things Qantas, the only consistency is inconsistency.
I've had some great experiences on early morning flights on a Saturday SYD-MEL with a CSM seeking me out and welcoming me onboard and asking me what selection of newspaper I would like, in addition to thanking me for continuing to choose QF.

Peak times, i've been lucky to get a greeting - they can't seem to read the new boarding 'slips' thanks to NGCI it seems.
Conversely, as a WP flying in domestic J, I've had attitude from the 'queen' who was assigned to me who couldn't quite get a mineral water with lemon and no ice right after 4 or 5 tries. The last one was lemonade and I told him not to bother. He then made his way back to the galley and screamed across the entire cabin 'I'll have to get someone else to help YOU it seems'. I was quite embarassed, and only my schedule at the time prevented me from writing a 'Dear Qantas'.
Internationally, I've had both great, average and horrible experiences in Y, J and F. I recall a time when the FA exclaimed 'ah f^&* it' right beside me in J coming back from SFO as he couldn't separate a napkin. That warranted a complaint. Apparently the gentleman (term used loosely) no longer works for QF.
So in summary, in my experience it is hit and miss... you must have been lucky.
On a side note, I've yet to see any material changes to SYD dom J lounge... so much for a renovation...