I don't really know, all servers have their downsides.
>Like PvP/Faction servers aren't the best because it's hard to get your server to be know, there are always those PvP servers that everyone plays on. Besides its a pain in the neck to deal with those players whose bases get raided by xrayers. If you own a PvP server there will always be atleast like 10 hackers.
>And Minigame servers; there are a couple of minigame servers, and those are well known because they have they're own original minigame. If you want a minigame server to get popular then you need to be able to code plugins, because if you want your minigame server you need to have an original game. People normally think "What's the point of going on a little minigame server, when you could just could go on a big minigame server, where they have original games"