I tried all the browsers listed... I was especially curious about Camino, I was told it's the Mac optimized Firefox, but it didn't live up to my expectations by far. I found customizing it a pain, and even the stuff on dedicated customization sites didn't really impress me. I switched back to Firefox, which is the browser i'm currently using.
As for Opera... they say it's more tailored for PC's, but I don't like it, even on PC's. Fastest browser for PC's my ass...lol. I found Safari or Firefox to be the fastest one.
I like the Safari bookmarks system, so I still use Safari on occasion, but it's mostly firefox here. I used Netscape for the longest time because that was the browser my school had on all their macs, actually I associated Netscape with Mac for the longest time because of it. xD It's not a bad browser, btw.