Turn rate vs. Load Factor tradeoff
Rookie,
The short summary is that for bank angles of 30 degrees or less, doubling the bank angle of a turn roughly doubles the turn rate (or cuts the turn radius in half) at the expense of increasing the incremental vertical acceleration by a factor of four. If your flight segment does not require the turn performance associated with a 30 degree bank, your passengers will definitely find the ride smoother/calmer if you can limit bank to 15 degrees.