Heres a pitch for an Server Name and Groups Theme:
Name: the block
Group Names: First Join:dirt block , Next Rank:stone block , Rank 3:wood block, Rank 4: glowstone, Rank 5:obsidian , Rank 6 or builder: iron block, then like the high ranks can be mod:gold admin:emerald Op or owner:Diamond
Could change the Rank names but for this idea the theme is: Blocks
Also i can make an website for the server and add like a donation page and im thinking for some donator ranks there could be like
donate $5 Coal:able 2 bypass server when full can plot 2 have another plot home (if we get that) and can give themself /kit Coal which has 64 Coal 32 Iron 16 gold and 5 diamonds or something
Redstone:donate $10 gets all the stuff in coal rank get /kit redstone which has full iron armour and tools and can do /feed
Lapis:Donate $20: gets all the stuff from ranks before can do /kit lapis which has iron armour and diamond tools and /back (if others cant do it)
Bedrock:donate $45 gets all the stuff from other ranks /kit bedrock which has full diamond armour and tools can do /nick and /fly
BedrockGod:Donate $100 gets all the stuff from before /kit bedrockking which has god armour can do /gamemode and /smite
all ranks will have differnt colours depending on which it is (e.g redstone has red)
and will have prefixs next 2 there name saying there rank.
Those are just ideas