For the longest time when first joining here, Ecair and Elle had the same voice to me. Never really believed they were the same, but rather had trouble distinguishing the two. With Eclair's long absence, Elle is now clearly distinct, so on the rare occasion Ecair passes by, that's not longer a confusion to me. Often read here within the recent post link at the bottom of the homepage, and can read the forum without avatars or paying notice to the usernames, and can still know who's speaking. Possum was here long enough that she should have developed her own voice, and sometimes that would start to happen, but no sooner than that would happen, she's say something so profoundly you. Don't ever tell me if right or wrong; it makes it all the more interesting.
I had the same, with Elle and Eclair. Now they have become really distinct, but in the beginning it was hard.
It is not just the sound of the voice, way more than the sound it is the rhythm. One of the most distinctive rhythms is the one of Kit. She sounds just like the mother of a friend I had in secondary school.