Some suggestions by me..

Okey, I've got some suggestions with the intention of making the server more fun.

Level system :
There should be a level system where people can level up using "Experience points"
Every hour or so, at xx:00 we should receive a paycheck and sign it at a townhall, Now we'll also need a townhall, In my opinion, the library at Palomino would be perfect. SO this is how it works, we get a check at let's say 1:00, we get a specific check number on our screen, we can go in townhalls and do /signcheck [number] to sign it. If we don't sign it in 30 minutes, or before 1:30, the check expires. Now people can log on 1 minutes before the check comes and sign it ? Well to avoid that, I've got another suggestion. Make it so we can sign check only when 30 minutes have passed. Okey so let's say I sign a check, I get my pay etc. and then experience points. If more than 30 minutes have passed, I'll get 1 exp. More than 60 = 2. More than 90 = 3. And we level up by getting a number of exp. points. As we level up we unlock features, like /mask'ing up above level 10 or something. You can always change the numbers above, just add something similar to this.

Helpers:

There should be some helpers helping out the server, doing stuff that admins don't get the time to do. For example, answering someone's questions. Giving tutorials. Teaching how to properly Roleplay etc. Now to contact a helper, there should be a cmd, like /helpme. When someone is in need of help, a helper can Tp to the person ((Only when someone is in need of help)). And helpers also get the title "Helper" in /n chat. Only admins should be able to decide who should be a helper.
Edit; Helpers should not get to wait 30 seconds after answering someone in /n. And they should be able to /mute anyone from /n or /o if someone spams it or doesn't use it properly etc. (( By that I mean if someone starts talking about a different server in /o. Or if someone goes off-topic in /n ))


Chat colors :

Different chats should have DIFFERENT colors. I've seen most of the chats having almost the same color, which confuses me a lot, and I sometimes mix some chats too.
For example :

/n = green.
/r = brown.
/o = white
/f = Cyan or light blue.
/s = orange
normal IC chat = white.


For RCPD :

The RCPD highs-speed-unit vehicles should have sirens.

-Aaaddiill-

I agree with you Aadil !! And I suggest also /mask <Command> which allows the player to wear a mask that hides his name & his ID.