I delete most comments that include graphics. This especially includes invitations to "backslapping" groups -- the ones with rules like "post one, comment two". I don't get these kinds of comments very often, but when I do they really annoy me.
I usually don't mind if you include a thumbnail of your own photo if you want to mention something about how it relates to mine, unless it feels like you are just self-promoting.
I'll make exceptions to the above whenever I feel like it.