January1may, soon after the aluminum coins lose their luster and start to tarnish grey, personally I think the dull ugliness overtakes the (little amounts of) beauty of the design.
For the Riau coins, they're a bit uncommon since only circulated for maybe a year until recalled by the angry central governemnt, but not many people are interested in them either

. At least the mint cared enough to put some edge lettering

Add this with the exact same reverse since 20 years+ ago...


Pic: Indonesian coins since the 90's, excluding 2016 issue and IDR1000 ones. (Who decided to put nutmeg plant in the IDR25 coin design though, very odd design

)
The strike quality of these coins is poor too, the text on the banner held by Garuda (should read
"Bhinneka Tunggal Ika" looks blurry except the large alum IDR500.

Example is from '90s IDR100 "traditional cow race" coin.
And here are the decent IDR1000 coins:


So in conclusion here's why I don't like most coins of my own country:
1.Too much aluminum
2.Many have exactly same reverse, boring
3.Poor strike quality
4.Odd design choice. Nutmegs? Parrots? Why not tigers or rhinos, or maybe some batik pattern?