I'm a happy eMule v0.30a user.
I was using eDonkey but I tryed eMule and wow, what a difference. edonkey is ugly, while eMule is much much more prettier. And the features are great to. And the most important: after leaving eMule open for some time, I get 60kb/s speed (on ADSL) whil eDonkey never went more than 10...