Ironically the L32 Series 3 Supercharged 3800 never came in a Buick. Only came in Pontiac Grand Prixs from the mid-late 00s.
But really I just plain like the 3800. They have a distinct sound, especially at startup that I'm fond of. This one is a Series III which was the final and (IMO) best revision. They had a long production run and are stupid simple. The most complicated part is all the goofy accessory brackets GM used as a result of it being used in so many applications for so long.
My grandpap wasn't a car guy at all but he liked the GM 3800. He had 3 or 4 cars with them.