157 known values for skin with current usage counts:

1. default (21770× used)
2. red (16461× used)
3. green (11041× used)
4. follower (4075× used)
5. clown (1137× used)
6. trapper (945× used)
7. vampire (861× used)
8. lab_apprentice (796× used)
9. helmet_banana (555× used)
10. snowman (554× used)
11. og_white (473× used)
12. anniversary (448× used)
13. rural_fella (416× used)
14. cool_cap (411× used)
15. daisy (394× used)
16. party_hat (392× used)
17. gingerbread (304× used)
18. panda (232× used)
19. gift_box (225× used)
20. pumpkin (215× used)
21. monk (209× used)
22. black_dog (192× used)
23. og_purple (183× used)
24. dog (167× used)
25. anniversary_2 (161× used)
26. builder (160× used)
27. edm (155× used)
28. toaster (138× used)
29. demon (126× used)
30. tea_cup (122× used)
31. og_yellow (115× used)
32. og_pink (108× used)
33. cyborg_3 (105× used)
34. green_spikes (88× used)
35. reindeer (88× used)
36. cyborg_1 (87× used)
37. elf (87× used)
38. grim_reaper (84× used)
39. bad_cap (77× used)
40. detective (70× used)
41. wizard (67× used)
42. joker (64× used)
43. cubix (62× used)
44. king (61× used)
45. evil_bot (61× used)
46. grey_cat (59× used)
47. sushi (57× used)
48. mad_scientist (56× used)
49. narwhal (55× used)
50. orca (53× used)
51. headset (52× used)
52. mummy (52× used)
53. cat (51× used)
54. peach (49× used)
55. spikes (48× used)
56. yeti (47× used)
57. anniversary_3 (45× used)
58. security_bot (43× used)
59. rplace (43× used)
60. parrot (41× used)
61. fries (37× used)
62. lunar_dragon (37× used)
63. white_demon (37× used)
64. ninja (34× used)
65. murica (34× used)
66. eliminated (34× used)
67. siren (33× used)
68. ghost (31× used)
69. shades (31× used)
70. wolf (31× used)
71. country_nl (30× used)
72. angel (30× used)
73. bow_tie (29× used)
74. cyborg_2 (27× used)
75. astronaut (27× used)
76. top_hat (26× used)
77. shark_attack (24× used)
78. festive_lights (22× used)
79. alien (22× used)
80. devil (22× used)
81. treasure_chest (20× used)
82. bee_costume (18× used)
83. apple (18× used)
84. country_us (17× used)
85. whale (16× used)
86. rabbit (16× used)
87. bunny_costume (16× used)
88. scuba_diver (16× used)
89. country_de (16× used)
90. ramen (15× used)
91. curious_bot (15× used)
92. bandit (15× used)
93. tiger (14× used)
94. blue_dinosaur (14× used)
95. block (14× used)
96. country_fr (14× used)
97. cow (12× used)
98. country_se (12× used)
99. country_il (12× used)
100. country_be (12× used)
101. leprechaun (12× used)
102. carrot_costume (11× used)
103. pirate (11× used)
104. country_gb (11× used)
105. dinosaur (11× used)
106. boby (10× used)
107. country_pl (10× used)
108. country_fi (10× used)
109. monkey (10× used)
110. country_au (10× used)
111. icefox (9× used)
112. country_no (9× used)
113. burger (8× used)
114. shape (8× used)
115. firefox (8× used)
116. science_adept (8× used)
117. fairy (8× used)
118. mecha (8× used)
119. country_cz (8× used)
120. spy (7× used)
121. country_ro (7× used)
122. country_it (7× used)
123. country_es (7× used)
124. red_cocoa (7× used)
125. steampunk (6× used)
126. graffiti (6× used)
127. country_gr (6× used)
128. mark (6× used)
129. unicorn (5× used)
130. country_hu (5× used)
131. nutcracker (5× used)
132. country_ca (5× used)
133. alice (5× used)
134. jailbreak (4× used)
135. polar_bear (4× used)
136. pineapple (4× used)
137. country_si (4× used)
138. green_cocoa (4× used)
139. country_ru (4× used)
140. firefighter (4× used)
141. country_ch (4× used)
142. popcorn (3× used)
143. black_crown (3× used)
144. banana (3× used)
145. country_hr (3× used)
146. yellow_crown (3× used)
147. cardboard_box (2× used)
148. burglar (2× used)
149. hamster (2× used)
150. pig (2× used)
151. blue_crown (2× used)
152. white_crown (2× used)
153. buffalo (1× used)
154. stinger (1× used)
155. fossil (1× used)
156. artist (1× used)
157. alfie (1× used)