Maybe, something from my experience.
Every time, when I have possibility traveling as passenger in lusty ATR, I ask about last row. It's part of my private super top secret scientific research. I try to hear how passengers comment what's actually happening on board (especially extra situations connected with traffic, weather, etc.). It helps understand what passengers like, what dislikes, etc...
As We know, good pilot in cockpit it's lazy pilot
(it was always said to me by my instructors, and i have to agree with this). In my small company we execute most of departures as RNAV, so as we all now when we hit out NAV button Flight Director will draw our turns with more than 15degrees. During departures passangers are benumed mostly by beauty of ATR engines and propellers. (I've never understood how people can tolerate that noise). I (and probably passengers too) always begin hear my own thinging about 10minutes after take off. I've never remember which BANK (LO or HI) was used by my colleagues in cockpit. So consideration is easy. Passengers aren't able to feel additional amount of comfort (when depart is in LOW BANK) because noise, vibration, and shock created by ATR during depart kill comfort thoroughly.
So in my opinion discusion about LO or HI BANK during departure propably is interesting, but it is exactly as discusion about which hols are more important - Christmas or Easter? Conclusions: Cross FL100 as soon as possible and open your meal...
Little better is during our loooong cruise. Supplicatory prayer of calm is finished (of course calm is still only a dream), and I (when fly as pax) always starto to be interested what's happening and where we are. So during cruise and during initial approach using LO BANK is very good idea, and it's small chance to improve comfort of our guests on board.
Special phase of flight when I ALWAYS use LOW BANK is holding. Also I always ask controler about possibility of extending outbound (sometimes it's 4 minutes !!!). I know, that passengers dislike manouvers in holding pattern (especially when it's full AT7, because then pitch during Hold is almost 5deg when ias is 160=170kts).
See you on TCAS
uncle_john (Poland)