Tony Williams made an interesting entry to his blog on his reaction to short and long lines, and what kind of poems short or long lines are best suited to etc.
I’ve been thinking about this, but haven’t found anything compelling to say, other than that I really like Sarah Maguire’s poem, Passages, but that I, like Tony, tend to lean towards a longer line. I’m sure Tony would be happy to hear from you at his blog if you have any thoughts, and I’d like to read them too!