Both things you've hosted already require minimal creativity on your part. Try to be creative.
He's asking for suggestions
He's trying
So why don't you just ease up and help him out
Glass, my offer earlier over steam holds true: if you get a city RPG mod, preferably anything but iban's, I'll make you a custom city. Turns out I never uploaded those pictures I was talking about, but here's a list f old cities I made, with the later images ring more recent. I also built Psp's (though in a rush and out of necessity so not much room for creativity:
http://m.imgur.com/ljKBwtF,KlrQlVR,D4ntR7k,OLpJ4Kr,sKewict,TDFclx0,T8MrVq1,F6n4Y5f,vEss27z,nOJOBiC,izZSfPb,pOjiHYs,CnCs3ll,0AOQt67,bMSSFkm,isM5BE8,1jyaXsY,iqSSWhX,QWufK3I,YrJBBE3,ypqpQwE,Si1VusXAnd here's a single shot of the roads and props I was offering to use for your city.
http://i.imgur.com/8TputNq.jpgStreet lights are functional, traffic lights work in a regular rotation and create invisible walls to stop cars, the roads use an entire 64x64 while sidewalks are on 16x32 baseplates, fire hydrants explode when shot or hit, garbage cans can be lit on fire and The large trash bins can be opened and closed to hide inside of
Oh, and if you use elevator bricks, the railroad crossing works and has flashing lights, sounds and the cross guard drops down.
If the city thing doesn't work out, I have a lunar jail escape I've been working on, I can manage all the building, environment, administration recommendations, etc, I can show you the jail tomorrow in game if you'd like
Edit:
Since the poll is heavily towards fort wars, I also have an old fort wars map I was working on that I DID host an alpha for, it went exceptionally well and I found out all the bugs and glitches to my build. The spawn is an aerial-hub that has 16 drop pods, 8 of them operation and 8 just for looks, and it has spawn rooms that force players to read the rules. There are also spy cams that can be accessed from the aerial-hub OR public bases. The fort wars is based on teams, however it is a free for all and team killing earns you only one point less than a regular enemy kill.
Also, players who read all the rules get a code that gives them access to build tools and 1 of 3 pistols from a supply crate at the ground-spawn, which is also protected by zone events.
I wouldn't recommend planes however.