I seriously wonder why the windows IRC clients (not multi-things like trillian) really look (visually) bad and "old".
Seriously, the only one being a bit better is KvIRC but it's still not reaching half of what
linkinus (thanks for that, I didnt know it) and
Colloquy (the one I use on my mac, even though I'm more on my school pc laptop nowadays, with Mibbit) look like...
It seems to be the same case for Linux but on this platform I wouldn't say interfaces are of greater importance (compared to windows)