I use invisible mode because my pc's on all day, and I can't be bothered to log in and out everytime...if I wasn't invisible i'd be permanently on the active user list, even though i'm away from the computer most of the time.
People can see when i'm 'actively' at Jref because I'll write three or four posts in quick succession.
I tried 'visible' mode for a day, logging out each time I visited (two or three times, to check for pms and to see if anyone was in chat when I wasn't busy).
The logging-in and out was fine, but the thing that's made me go back to 'invisible' mode is that everytime I log back in the system doesn't seem to remember that I don't want any music threads to be listed in 'today's posts' (that's a big thing for me!)
I have to go back through the settings and save it everytime I log-in!
That alone forces me back to invisibility. I do hope they fix it, or perhaps it's a Firefox issue?