my first few commutes back from work were terrible... I remember many a time when I was so close to getting off and pushing... i was riding a duallie with road rims...
the meadowbank up to eastwood ride, i thought, i would never enjoy and always struggle
BUT, since I've been riding solidly since the start of the year and got myself a flat bar roadie, i have more than doubled my climbing speed and felt fine at the top...
It is this improvement which has made cycling/commuting so satisfying!
... and the awesome thing is, i got so much more improving to go....
i've played all sort of sports, like squash, basketball, volleyball etc... and i get to a point where the improvement seem to be so minor (or i get injured and have to take a break from it), and it just seems to depend on the day how you play....
... there is something about cycling, there is an awesome feeling of freedom when you hop back on... it's something you can't describe... maybe the wind in the hair thing??