In reference to the Dash 8 aircraft, and prop aircraft in general.
Make sure that you go to the restroom before boarding. Some smaller aircraft do not have lavatories. I believe that the Dash 8 does. The seats are a fraction smaller, and it seems that they do not recline quite as much. We are talking fractions of an inch, but, 'tis true.
Prop jobs are slower at about 300 mph vs. 520 mph or so, and make a bit more noise. Other than that, buckle up and enjoy the ride.