The aircraft (or family of aircraft) that has featured more in my life that any other is the De Havilland Dash-7 and Dash-8. I have commuted regularly on these for many years; starting with Brymon Airways in the 1980's:
Photos: De Havilland Canada DHC-7-110 Dash 7 Aircraft Pictures | !!!!!!!!!!!!!!
Through their take over by BA in the 90's:
Photos: De Havilland Canada DHC-8-311 Dash 8 Aircraft Pictures | !!!!!!!!!!!!!!
And more recently in their latest colours:
Photos: De Havilland Canada DHC-8-311 Dash 8 Aircraft Pictures | !!!!!!!!!!!!!!
Unfortunately, Air Southwest stopped flying to Gatwick earlier this year, which brought to an end nearly 30 years of the 4 times daily London/Plymouth/Newquay round robin that has been such a feature of my life.
Now, I continue to use the only service available, which is good, but the friendliness of the early years has long gone.
Photos: De Havilland Canada DHC-8-402Q Dash 8 Aircraft Pictures | !!!!!!!!!!!!!!