I mean i can understand he's fun to play but he's honestly boasting ridiculous numbers that can't be addressed with the "fun factor" in any way.
http://champion.gg/statistics/#?roleSort=ADC&sortBy=general.playPercent&order=descend 35.86% playrate in plat +; and this is, mind you, the **smallest** number
http://www.leagueofgraphs.com/champions/stats/adc/diamond/by-winrate 50.6% pickrate in diamond+, **you literally have more than 50% the chance to see Lucian in a game**
http://www.probuilds.net/ most played champion
37 out of 51 challenger ADCs have Lucian as their most played champion (WAY MORE THAN HALF!!!)https://www.reddit.com/r/leagueoflegends/comments/4hhfw3/til_that_37_out_of_51_adc_mains_in_eu_challenger/
Thore are honestly not the numbers of a champion that he's played because he's """"fun to play"""", those are totally unhealthy numbers that are killing botlane variety.
Hell, a "popular" champion has 17.69% when he's both fun and not broken (Cait , Vayne).