One thing I do when I think I like a headphone is to read every thread I can find on it here, browse Headphone.com and see what they have to say, look at big/detailed pictures up close, look at frequency graphs, read reviews, comparisons with other headphones, anything else available... then let my intuition go from there.
That's how I ended up with the DT880... just had the feeling that it was the headphone I'd always been looking for. But I didn't just run out & buy it even after feeling that way, I slept on it for a few days to see if it was still tempting. The DT880 passed my smell test in every way so I bought it, and indeed I was not disappointed. Auditioning would be even better, but often that's not an option.