Well, why people discuss about what is the best content/speed etc tracker and not about its visual? I think its also very important a good lookin tracker.
In my opinion the best was (past) SceneHeaven, but only the version 1, they updated to version 2 and removed the text effects on torrents, the header was awesome as well the icons, and now the header is something like a bunch of photoshop brushes, doesn't have text effects and i don't like the icons (the icons is used in a lot of trackers, lol), eh, too bad.
So, at this time the best lookin tracker for me is TL. ^^
Also i don't like the RevTT visual, it looks unfinished, doesn't have some images, there's no buttons, etc
Well, and for you what's the best lookin tracker?
PS: Trackers which doesn't look good, users tend to leave it sooner or later, unless it's a very valuable tracker