MAn go the 727!
Theyre amazing planes.. i love riding them.... less commmon than the 737 also.
the take off is especially good. The roll is very silent and it felt as though we were speeding... i love it hehe
oh and did I say i loved it?
nah but seriously... its also a very user freindly plane (to me) compared to the 737 and its quieter inside (i think) - the seats will be older in most cases, thats the downside.
Although BA in South Africa recently refurbished the seats and they were great.