Aokiji rides a bicycle , Garp is Garp, Sengoku has a goat and weird hair, Kizaru is Kizaru , Fujitora loves to eat Ramen and pretend to be helpless and play games
The Admirals always had a few quirks. Akainu being the one exception
Aokiji riding a bike through Grand Line is top stuff bruh.
Garp and Sengoku are old era, you dont group up with the Admirals. Admirals are kinda similar, "cool (normal)" design, cool powers.
Then you have Ryokugyo who is Doraemon, who clearly doesnt fit regarding cool powers (unless that flower is some technology/or some special external plant and not something of his DF, though that would still look ridiculous -> like all the ridiculous things Sanji's opponents showed us anyway).
P.S: the few quirks are regarding their personalities, not their powers.