You know, maybe Cybertronian culture is militaristic instead of having an Earth-like culture based on entertainment and art like ours, allowing creative flow and ingenuity as our culture does and encourages, with people investing in their talents.
Cybertronian culture could be a little more stern and focused on efficiency. They do have songs, but they're either war anthems or basic instrumental music for celebrations. They don't really allow artists and musicians to earn a living and focus more on technological advancements, colonization, and establishing control and order.
They dance, sure, but none of them make a living out of it and most likely learned from other alien organics anyway.
They have paint-job artists, but no other type of artist. Maybe people who make statues of the most important people do so as an honor. Other "artists" probably have one job mixed in with another job as well. For example, construction workers make statues, and maintenance workers also maintain other bots in addition to their own jobs. Paying extra for aesthetics.
They don't have a lot of variety in their energon, their main source of energy, with any sort of pizzazz. They sort of consume it as it is, maybe changing the shape for more convenience to carry around or just for a slight chnage of pace.
They've practically got the opposite of Earth culture, if that were possible. Their stories don't encourage positive lessons, but instead convey what is safe and what isn't in the easiest way. Basic messages that focuses on survival.
So when Cybertronians entered Earth in media, all of them immediately got pulled into it, extremely consumed it, and basically integrated it into their own culture. They used it for their parties and incorporated our dance moves into their own. They read and watched our entertainment. They latched on because they don't have anything like Earth; their culture is orderly and efficient, which allows them to all be strong, intelligent, and durable. But Earth has much life and indulgence. They cling to it because it's something outside of themselves, something not militaristic but made to be viewed and enjoyed with others, using our figurative language and easily influenced by the humans around them as well as the culture because it's simply more fun.
Don't get me wrong, they have pride in their own culture and have their own festivals and holidays that Cybertronians celebrate once in a while. They enjoy their own identity as being stronger than most... but enjoying other cultures is fun. And who doesn't like fun, especially since humans make really awesome-looking cars to transform into and vibrant paint that really looks good on them.