Garibaldi is one of those fanboys who press all his friends with recommendations. Examples:
Lennier: After bonding over his motorcycle, he keeps forwarding classic vehicle trivia and events to him through Babcon. Lennier opens them dutifully, replying to every one even when he has no idea what he’s looking at. (after a while he becomes educated by exposure and returns the favor with relevant news stories and events he finds on the extranet)
G’Kar: One quote from an earther poet and Garibaldi starts sending G’Kar book recommendations. Their tastes differ wildly, but Garibaldi successfully hooks the Narn on pulp detective novels, not that G’Kar advertises this. Wouldn’t want Garibaldi to get too big for his britches, you know.
Ivanova: With full knowledge of her secret coffee crop, Garibaldi requisitions ingredients for all manner of bizarre drink recipes. They meet every now and then in her quarters to concoct, sample, and judge the blends.
Londo: It’s no secret that Londo is a music lover. He researches and collects pieces from all the races, even the Narns. While his passion is most certainly classical, that does not stop Garibaldi from overwhelming him with classic Earth genres. Londo will take any recommendation, even if he openly hates almost everything he hears, which prompts still more outrageous recommendations for the humor of it. Still, Londo finds a certain affection for a well-used instrument even if it is plugged into an amp. Vir inherits this habit along with the rest of Londo’s stuff and is far more receptive – becoming a bit of a rock and roll junkie, himself.
Delenn: One time consenting to watch Garibaldi’s “Second favorite thing in the world” and Delenn gets cartoons in the mail. Not just cartoons, though… anything with a Warner Brothers property on it. This devolves quickly into screencaps, then screencaps with phrases attached, then memes in general until Garibaldi is the source of delovelie‘s awesome headcanon