I also agree with Tkitna. He had a unique way of songwriting... And, Beatle-years-wise, if you listen to his very few songs and compare them to the hundred or so Lennon/McCartney songs, there is a major distinction between them all...
I was listening to Abbey Road the other day, but not in the "correct" order... It was in a more random playlist (except for the medley, of course). And after hearing a few of the songs, then "Something," it really just... took my breath away... the whole genius of the song... Same with I Me Mine... They're two creatively written songs...
Not to mention All Things Must Pass... Most of those songs are of my favorite songs ever... "Isn't It A Pity?" with the brilliant "coda" of Hey Jude at the end, brilliant!
I find his songwriting creativity to be my favorite aspect of his musical career, but I've noticed that people don't usually go around saying, "man, Harrison was such a great songwriter!" ya know?