You had me at mecha. I'll likely will be starting up my own [i]Mobile Frame[/i] setting sometime next month, which I've booted up a couple times before. I'm always up for a good mech stomping. Now, since you've established that the setting is focused on real robots (thank God), we ought to set some parameters for the typical machines in your RP. How tall are they? What kind of engines are they powered by? How many weapons do they typically carry? Are they restricted to walking, can they skate with wheels on their feet, like in VOTOMS, or do they use some other form of propulsion? What kind of armor are they equipped with and what can they withstand? 

All these questions add to the depth and realism of the setting, and it's the nitty gritty that makes real robots enjoyable. Maybe some ideas can be had in the description of the mechs for my [i]Mobile Frame[/i] setting:

[quote]"Mobile Frame" is the name attributed to the bipedal machines used by humanity. These frames are used in many aspects of life, from construction, to agriculture, to warfare and so on. Frames vary in size depending on their purpose, although most military frames top off at five meters in height. Deviations are rare, but some experimental frames may be taller or shorter than the norm depending on their intended role. The latest military frames are powered by miniaturized, thermonuclear reactors and held together by an internal skeleton of sorts, to which armor and components are attached. Myomers, thin tubes of artificial musculature, sheathe actuators, which are the joints of a frame. This allows frames to perform precise movements and to an extent, mimic that of the human body. Multiple layers of laminated steel and composite armor protect the frame's internals. 

The cockpit of a frame is located in the torso, and allows the pilot to perceive the outside world through electronic monitors. These displays are connected to various cameras fitted on the frame's body, the main of which is typically mounted on a head unit. Cockpit designs closely resemble that of jets, having control systems that make use of combinations of joysticks, throttles, and foot pedals. Overall appearances and controls may vary from one manufacturer to another. 

Frames are semi-modular machines, allowing them to be equipped with a variety of equipment and weaponry. This commonly includes autocannons, in the form of frame-sized rifles, missile and grenade launchers. Most frames can carry around three armaments, not including smaller, antipersonnel or integrally-mounted weapons. Beam weaponry has not been perfected on a level required to be assigned as a standard-issue armament. Gauss weaponry remains an experimental technology, but that hasn't stopped some factions from slapping them onto their machines. While the combat protocol of most militaries pass the notion of hand-to-hand between frames as unrealistic and impractical, there are mercenaries who try to make use of melee weapons on their frames, whether for fun or fear factor. Their effectiveness is dubious, but that hasn't stopped them from trying.[/quote]