145 known values for skin with current usage counts:

1. default (20846× used)
2. red (15832× used)
3. green (10539× used)
4. follower (3685× used)
5. clown (1146× used)
6. trapper (942× used)
7. vampire (855× used)
8. lab_apprentice (800× used)
9. snowman (557× used)
10. helmet_banana (554× used)
11. og_white (470× used)
12. anniversary (444× used)
13. rural_fella (417× used)
14. cool_cap (413× used)
15. party_hat (405× used)
16. daisy (395× used)
17. gingerbread (312× used)
18. panda (231× used)
19. gift_box (227× used)
20. pumpkin (213× used)
21. monk (192× used)
22. black_dog (182× used)
23. og_purple (177× used)
24. dog (163× used)
25. builder (160× used)
26. anniversary_2 (159× used)
27. edm (156× used)
28. toaster (130× used)
29. tea_cup (121× used)
30. demon (117× used)
31. og_yellow (114× used)
32. og_pink (108× used)
33. reindeer (93× used)
34. cyborg_3 (90× used)
35. elf (89× used)
36. cyborg_1 (85× used)
37. green_spikes (85× used)
38. grim_reaper (83× used)
39. bad_cap (77× used)
40. wizard (67× used)
41. detective (67× used)
42. cubix (61× used)
43. evil_bot (60× used)
44. grey_cat (56× used)
45. mummy (54× used)
46. headset (52× used)
47. yeti (50× used)
48. spikes (49× used)
49. cat (49× used)
50. peach (48× used)
51. security_bot (47× used)
52. king (43× used)
53. mad_scientist (42× used)
54. rplace (42× used)
55. joker (42× used)
56. sushi (41× used)
57. parrot (39× used)
58. fries (38× used)
59. angel (37× used)
60. narwhal (37× used)
61. ninja (33× used)
62. siren (33× used)
63. shades (33× used)
64. ghost (32× used)
65. murica (32× used)
66. wolf (31× used)
67. white_demon (31× used)
68. orca (31× used)
69. eliminated (31× used)
70. lunar_dragon (31× used)
71. country_nl (30× used)
72. bow_tie (30× used)
73. top_hat (26× used)
74. cyborg_2 (26× used)
75. astronaut (25× used)
76. shark_attack (24× used)
77. devil (24× used)
78. festive_lights (22× used)
79. treasure_chest (20× used)
80. country_us (19× used)
81. alien (17× used)
82. scuba_diver (16× used)
83. country_fr (15× used)
84. country_de (15× used)
85. curious_bot (15× used)
86. rabbit (15× used)
87. tiger (14× used)
88. bunny_costume (14× used)
89. bandit (13× used)
90. whale (13× used)
91. country_gb (12× used)
92. blue_dinosaur (12× used)
93. block (12× used)
94. country_il (11× used)
95. country_au (11× used)
96. ramen (11× used)
97. country_se (11× used)
98. pirate (11× used)
99. country_pl (10× used)
100. bee_costume (10× used)
101. country_fi (10× used)
102. country_be (10× used)
103. carrot_costume (10× used)
104. country_it (9× used)
105. dinosaur (9× used)
106. cow (9× used)
107. country_no (8× used)
108. country_cz (8× used)
109. leprechaun (8× used)
110. red_cocoa (8× used)
111. fairy (7× used)
112. spy (7× used)
113. science_adept (7× used)
114. country_ro (7× used)
115. unicorn (6× used)
116. monkey (6× used)
117. country_ca (6× used)
118. boby (6× used)
119. country_ru (6× used)
120. country_gr (5× used)
121. nutcracker (5× used)
122. country_es (5× used)
123. shape (5× used)
124. mark (5× used)
125. green_cocoa (5× used)
126. country_hu (4× used)
127. firefighter (4× used)
128. country_ch (4× used)
129. burger (4× used)
130. polar_bear (4× used)
131. fossil (3× used)
132. country_hr (3× used)
133. steampunk (3× used)
134. country_si (3× used)
135. popcorn (3× used)
136. artist (2× used)
137. alice (2× used)
138. laurel (2× used)
139. burglar (2× used)
140. yellow_crown (2× used)
141. graffiti (1× used)
142. white_crown (1× used)
143. stinger (1× used)
144. mecha (1× used)
145. cardboard_box (1× used)