Wow...you guys like all the NEW stuff.
Well, for "an old guy" I'm sort of partial to the following -
727-200 TWA "Twin Globe"
Eastern DC7, DC8, DC9-51, B720
National DC6, 727 "sun king", L188
TWA Martin 404
Ozark DC9 & F27
Allegheny Convair 580
Western B707, B720, 727 and L188 Electra II
Delta and TWA Convair 880
Piedmont F27 & YS-11
...and other such vintage niceties!
Oh, and I do fly for 2 VA's so I have the usual conglomeration of 37's, 57's, 67's and maddogs. But the old stuff is just as fun.