My actual commute falls somewhere in between Max a mill's and MarqueeHoneymoon's. For it to be "perfect", I'd tack on 5-7 miles and eliminate the train ride, ease the transition for bike path to city streets (currently that's a choice between :
(A) A 74-step stair climb with bike and pack to the top of a bridge follwed by a sidewalk ride/climb of about 1/2 mile
(B) A ~60 yard dirt-grass climb to a shorter, level sidewalk ride and maybe an added 1/4 mile, and
(C) An added 1/2 mile, a high-speed road crossing ending in a high curb-hop, followed by a mile-long sidewalk/climb over the bridge with the stairs detailed above
...and install a comfortable shower at the work end.
I'm not complaining - it beats driving all to hell and gone.