I'm the type who always love to add images to my conversation, just as a wise man once said (i.e A picture/image is more than a thousand words), as it add colour to the conversation and makes it interesting to read.
An old school man (but not wise) said, the forum is not a kindergarten so over use images is not good.
It's not what I said but sometimes, you will see one of forum OGs, JetCash says it.
Images, graphics are good if they contain insightful information but if they are simply memes, overuse them is very annoying.