I really try to like sequins. But I don’t like them when they are just by themselves, stuck to a card, with their hole for everyone to see. Maybe with a rhinestone or a bead would be OK, but they seem weird to me all naked. What I do like with sequins is these flower like embellishments that I found on youtube.
When done nicely, you cover all the holes and its all symmetrical. It’s easy to do, though can get fiddly and sticky unless you have tweezers. You can use any size sequins and circle. I even started doing a large one on a canvas. Just draw your circle and glue sequins over in to cover the line and the rest just lines up.