157 known values for skin with current usage counts:

1. default (21814× used)
2. red (16511× used)
3. green (11068× used)
4. follower (4095× used)
5. clown (1137× used)
6. trapper (946× used)
7. vampire (864× used)
8. lab_apprentice (795× used)
9. helmet_banana (556× used)
10. snowman (555× used)
11. og_white (473× used)
12. anniversary (451× used)
13. rural_fella (414× used)
14. cool_cap (412× used)
15. daisy (393× used)
16. party_hat (389× used)
17. gingerbread (306× used)
18. panda (232× used)
19. gift_box (224× used)
20. pumpkin (214× used)
21. monk (207× used)
22. black_dog (191× used)
23. og_purple (183× used)
24. dog (167× used)
25. anniversary_2 (165× used)
26. builder (161× used)
27. edm (155× used)
28. toaster (137× used)
29. demon (125× used)
30. tea_cup (120× used)
31. og_yellow (117× used)
32. cyborg_3 (109× used)
33. og_pink (108× used)
34. reindeer (88× used)
35. elf (87× used)
36. green_spikes (86× used)
37. cyborg_1 (85× used)
38. grim_reaper (84× used)
39. bad_cap (78× used)
40. detective (74× used)
41. wizard (67× used)
42. joker (64× used)
43. cubix (61× used)
44. king (60× used)
45. sushi (60× used)
46. evil_bot (60× used)
47. grey_cat (59× used)
48. orca (57× used)
49. narwhal (57× used)
50. mad_scientist (56× used)
51. headset (52× used)
52. mummy (52× used)
53. cat (51× used)
54. peach (50× used)
55. yeti (48× used)
56. anniversary_3 (48× used)
57. spikes (48× used)
58. security_bot (43× used)
59. parrot (42× used)
60. rplace (41× used)
61. fries (39× used)
62. lunar_dragon (38× used)
63. ninja (36× used)
64. wolf (35× used)
65. white_demon (35× used)
66. shades (33× used)
67. murica (33× used)
68. eliminated (33× used)
69. siren (32× used)
70. country_nl (31× used)
71. angel (31× used)
72. ghost (30× used)
73. bow_tie (29× used)
74. cyborg_2 (27× used)
75. top_hat (27× used)
76. astronaut (27× used)
77. shark_attack (26× used)
78. alien (24× used)
79. devil (22× used)
80. bee_costume (21× used)
81. festive_lights (21× used)
82. treasure_chest (20× used)
83. country_us (17× used)
84. whale (17× used)
85. apple (17× used)
86. rabbit (16× used)
87. bunny_costume (16× used)
88. country_de (16× used)
89. scuba_diver (15× used)
90. ramen (15× used)
91. curious_bot (15× used)
92. blue_dinosaur (15× used)
93. block (15× used)
94. bandit (15× used)
95. tiger (14× used)
96. country_fr (14× used)
97. icefox (13× used)
98. leprechaun (12× used)
99. country_be (12× used)
100. cow (12× used)
101. country_se (12× used)
102. country_au (11× used)
103. carrot_costume (11× used)
104. pirate (11× used)
105. country_il (11× used)
106. country_gb (11× used)
107. boby (10× used)
108. country_pl (10× used)
109. monkey (10× used)
110. dinosaur (10× used)
111. country_no (9× used)
112. country_fi (9× used)
113. mecha (9× used)
114. country_cz (9× used)
115. science_adept (8× used)
116. burger (8× used)
117. shape (8× used)
118. red_cocoa (7× used)
119. country_ro (7× used)
120. country_it (7× used)
121. firefox (7× used)
122. fairy (7× used)
123. country_es (7× used)
124. graffiti (6× used)
125. country_gr (6× used)
126. spy (6× used)
127. mark (6× used)
128. polar_bear (5× used)
129. pineapple (5× used)
130. nutcracker (5× used)
131. steampunk (5× used)
132. country_ca (5× used)
133. jailbreak (4× used)
134. country_si (4× used)
135. green_cocoa (4× used)
136. country_ru (4× used)
137. unicorn (4× used)
138. banana (4× used)
139. country_hu (4× used)
140. firefighter (4× used)
141. alice (4× used)
142. country_ch (4× used)
143. popcorn (3× used)
144. burglar (3× used)
145. hamster (3× used)
146. black_crown (3× used)
147. country_hr (3× used)
148. cowboy (2× used)
149. yellow_crown (2× used)
150. pig (2× used)
151. artist (2× used)
152. alfie (2× used)
153. cardboard_box (1× used)
154. buffalo (1× used)
155. white_crown (1× used)
156. fossil (1× used)
157. stinger (1× used)