Dynazty, I am in there with Tunde...use IM for a comment back.  Often, if time permits, I will go take a look at the commentators gallery when these are folks I don't know, or someone I do know and haven't viewed their gallery recently.  

One good thing about the "recent views" on personal page, this gives memories a chance to relax and it is easy to revisit an image and comment  or IM as desired.

I generally use the IM.  To get a "thread" going on a gallery comment section could be too much, IMO.             Peace and JOY...TomDart.