Quake3 because of the movement speed and jumps, Counter Strike because of the strenght and accuracy of weapons, War Rock because of the F2P feeling and importance of reloading. (I'll explain that later)
I'll be talking about the DeathMatch mode of the game now.
Equipment
I liked it, definitely better than the other Free2Play game I played War Rock because you can choose whatever weapon you want, you can have a strong primary weapon, a secondary weapon which can be either an auto shotgun, an MP5k or an UMP, and one side arm which is either beretta or desert eagle. There are two kinds of grenades; HE and Smoke and of course you have the combat knife (which I didn't use much due to the amount of weapons I had anyway). You can choose different items, I don't remember them all but I'll mention some: Kevlar, Helmet, Medkit, Silencer, Laser sight. All of them are useful but you can only have two of these in the same time.
Strenght vs. Agility vs. Accuracy
All weapons have their good sides and bad sides. Let's take G36 for example. G36 is a scoped half-auto gun with a magazine of 30 bullets. It's strenght is not as good as the AK-47's or M4A1's, however it's accuracy is probably the best of all machine guns. Scope helps a lot when fighting long range but when it comes to close range, your accuracy becomes extremely important to survive. Most guns are the same weight but there are some heavy machine guns with huge magazines but due to the fast gameplay, I wouldn't recommend them for constant using.
Reloading and Ammo
Very important and it gives a game an important good side.
You have to decide carefully when to reload because in DeathMatch you can be killed easily while reloading. With average machine guns you only have 3 magazines, all clips have 30 bullets. If you shoot 7 bullets and you have 23 more in your magazine and you decide to reload, you lose all the remaining bullets and load a second clip. This means you will only have 60 more bullets however you shot only 7. Reload only when you feel safe, if you run out of ammo, swap for another gun from your inventory. Side arms might look useless but they aren't. In fact they are pretty strong and fast. Beretta saved my ass plenty of times.
Stats
Doesn't matter wether the players are skilled or not, in DeathMatch it's very hard to get not only positive scores but a fair kill death ratio. I played 3 games in a row and I always had the same rate. I don't know if there's a hotkey to make screenshots and save them somewhere in the Urban Terror folder so I tried print screen button. Of course it only saved the last game's scores, so I used Paint to save it.

Maps
Most maps have both outdoor both indoor areas which makes the game balanced. Maps I played were detailed and bug free.
Evasion
Very important even though the guns are strong so you don't have to be shooting much to kill someone however you should always aim on the head. You can wall-jump (jump at wall, press jump button again and you jump off the wall in the same degree as you arrived there), you can powerslide (jump and when reaching the ground you hold crouch button which makes a fast slide effect, not as useful as sounds like but it looks good and is fun to do), you can sprint (not too useful either as you run fast enough anyway). If you combine these things smartly then you become a deadly ninja but unfortunately there's always someone else behind your back.
Spawning
Very bad in DeathMatches. The spawn points are placed too close to eachother and wether you die or not depends on how fast you get sight of the enemy who's aiming at you already, and can shoot him then prevent bleeding out.
Bleeding out
If you receive lots of bullets on the same part of your body, it will start bleeding. You can prevent bleeding by using Bandages which are unlimited to use. It won't give you more HP but will stop the bleeding thus losing HP over time. While using bandages, you are extremely vulnerable to the enemy because you become unable to use your weapons. When using bandages, try to make sure you are safe. You can't always stop bleeding on DeathMatches because you are being shot all the time and if not, someone will spawn some meters behind you anyway. You can't be careful enough.
Tutorial Demo
The game creators made a short tutorial on how to use your enviroment and weapons. Worth watching.
Players
Players don't talk much besides mentioning spawnkills or nice shootings. In the end they say GG though. I'm not sure wether some players were beginners or noobs but the average skill was lower than I expected.
Cheaters and PunkBuster
If there were cheaters in this game, fortunately I didn't notice. PunkBuster is turned off by default so it shouldn't be too hard to cheat and it can't be turned on anyway if you don't have some Quake3 related ID or something like that. I'd rather ask Kothar or Kuchcik about cheaters as they have more in game experience than me.
Pings
I had bad pings everywhere but that wasn't the fault of servers but my internet's. The good pings were around 30-60, I had 180-220. However my ping didn't effect my in game performance too much besides having some bad packet losses sometimes. When lagging, you don't have to shoot a meter away from your target to actually hit him/her. Luckily.
Graphics
I run the game on 1280x960, medium graphics. You can set up a lot of things related to graphics in the options, it would take long to tell about them all, there are some pretty useful things. The graphics are nice, if you saw the video in the other topic, you won't need this explained.
Over all
The game must be addictive and I personally like it already aswell. The game is balanced if we don't mention the bad spawns on deathmatches. I understand those who don't bother much with DX when there are some very good Free2Play games out there with better graphics and physics than DX has. I recommend this game to those who like tactical shooters like Counter Strike or War Rock.