His most famous work for a reason, definitely. ^-^
I know that sort of feeling, I also suffered with problems of self-worth... among other things. But I'm finished with that dark period for now, I hope, so I try to focus on brighter tomorrows. It's important to focus on the light of a new days to give you strength enough to press through the night.
And I don't often follow a particular form or pattern. Not intentionally anyway. Form is something I like to let flow openly when I write the poem. I let the words take shape and once it's finished I'll read it over and see that I've written the poem in a certain way just by writing it at all. I also write a lot of free verse to be honest, especially more recently.
Though a few of my favorite poems that I've written have been very short free verse works... and I'm also quite fond of elegies on occasion. Apart from that however I don't actually believe in trying to base my work around a specific form.
Edit:
Oh and I forgot to mention, I think haikus can be just as pleasant in English as they are in Japanese. It's just more difficult since Japanese is such a beautiful language.