55 known values for icon with current usage counts:

1. default (32091× used)
2. angel_wings (8815× used)
3. crown (6598× used)
4. joystick (6474× used)
5. moon (4255× used)
6. sakura (2427× used)
7. cat (2033× used)
8. dog (1730× used)
9. spider (1219× used)
10. pumpkin (727× used)
11. vampire (631× used)
12. headphones (557× used)
13. target (521× used)
14. sunglasses (516× used)
15. moustache (369× used)
16. skill_issue (315× used)
17. coffee (302× used)
18. panda (209× used)
19. snowflake (160× used)
20. santa (109× used)
21. pirate_flag (86× used)
22. king (76× used)
23. wizard (75× used)
24. reindeer (72× used)
25. octopus (70× used)
26. yeti (55× used)
27. rocket (51× used)
28. wanted (50× used)
29. bad_bunny (49× used)
30. lunar_dragon (49× used)
31. mountains (45× used)
32. koala (44× used)
33. bingo (37× used)
34. bread (35× used)
35. pyramid_eye (33× used)
36. planet (33× used)
37. ghost (29× used)
38. cactus (28× used)
39. pirate (26× used)
40. robot (24× used)
41. eliminated (24× used)
42. shark_attack (22× used)
43. watermelon (18× used)
44. cute_bunny (17× used)
45. jailbreak (13× used)
46. fossil (12× used)
47. clover (9× used)
48. ankh (5× used)
49. pine_tree (5× used)
50. random (5× used)
51. shooting_star (2× used)
52. bauble (2× used)
53. palette (2× used)
54. eleven (1× used)
55. build_off (1× used)