Afro-Ken is a 30 minute OVA and it utilises that 30 minutes to it's fullest potential.
Afro-Ken includes short "stories" that are from 10 seconds to a couple of minutes long. Each "story" has a different vibe to it and almost none of them are related to each other.
The animation is done with CG (computer graphics) and because of that doesn't look that appealing. The OVA was made in 2001 so the technology wasn't that advanced so no big suprise there. For the time it was decent.
The soundtrack has one banger song and the others are forgetable. The voice actor they hired for the narrator was perfect for the role.
There really aren't many characters in the OVA. There's Afro-Ken and other Kens, the narrator, some random stick figures and then there's an interview with the crator of Afro-Ken, Aimi Tetsurou. The characters get no time to devolope and don't have much motives in the OVA. They just exist. The only redeeming quality is their cute design.
As for enjoying the OVA, I'd say it's pretty enjoyable. There's no hidden meaning in almost any of the gags so you just watch them and get to have a good time.
If I would put Afro-Ken in a sentence it would be "a comfort anime". There's nothing to worry about when watching Afro-Ken.