My skin concept ideas:

EMT-mo (goggles, saftey mask, EMT blue jumpsuit, drops "med kits") good flavor quote "gonna need to double glove for this one..." also URF the mana-teemo. because puns.

surprise party rengar. RAAAWRRR!

anime villain leblanc (opposite of star guardian lux) complete with 90's anime villain laugh "OHHH HO HO HO HO HO!"

pin queen syndra (BOWLING BALLS!)

pro bowler kalista (i always thought her ult reminded me of bowling) also would like to see pincushion kalista (like a poorly sewn doll full of needles and pins)

sunshine mordekaiser (seriously, a happy rainbowy mord that makes daisies pop up. hilarious)

street shark rek'sai

i'd love to see more master chef skins

carnival trundle (circus barker outfit and squeaky bat)

elemental udyr (water, stone, fire and b-air)

leech cassiopeia (something other than a snake)

king crab urgot

thats all i have for now. feel free to comment :)