55 known values for icon with current usage counts:

1. default (31853× used)
2. angel_wings (8772× used)
3. crown (6571× used)
4. joystick (6444× used)
5. moon (4239× used)
6. sakura (2401× used)
7. cat (2025× used)
8. dog (1729× used)
9. spider (1219× used)
10. pumpkin (726× used)
11. vampire (625× used)
12. headphones (556× used)
13. target (520× used)
14. sunglasses (515× used)
15. moustache (368× used)
16. skill_issue (311× used)
17. coffee (303× used)
18. panda (209× used)
19. snowflake (160× used)
20. santa (109× used)
21. pirate_flag (84× used)
22. king (75× used)
23. reindeer (73× used)
24. wizard (72× used)
25. octopus (70× used)
26. yeti (57× used)
27. rocket (51× used)
28. lunar_dragon (49× used)
29. wanted (49× used)
30. bad_bunny (49× used)
31. mountains (43× used)
32. koala (43× used)
33. bread (35× used)
34. bingo (35× used)
35. planet (33× used)
36. pyramid_eye (32× used)
37. ghost (29× used)
38. pirate (28× used)
39. cactus (27× used)
40. robot (25× used)
41. shark_attack (24× used)
42. watermelon (20× used)
43. eliminated (17× used)
44. cute_bunny (17× used)
45. jailbreak (14× used)
46. fossil (12× used)
47. clover (9× used)
48. ankh (5× used)
49. pine_tree (5× used)
50. bauble (3× used)
51. random (2× used)
52. shooting_star (2× used)
53. build_off (1× used)
54. palette (1× used)
55. eleven (1× used)