Street Rats, as it stands, doesn't really provide anything in the way of "balance". While I have a few design principles I work around while designing balance, people will get torn through like wet tissue paper in combat if they aren't 'roided up and augmented with half of their points going into Toughness and Speed.
It also has a rudimentary grasp of the rules of mathematics, including such joys as linear explosion falloff and calculating distance and altitude using a longest plus half-shortest method that made my math/physics friend cringe in terror.
If you're overwhelmed by choices, your character creation process will take eight hours, because we (will) have a total of about sixteen thousand options just in the character creation packages. While each combination leads to an interesting character, you might want to align it to one of our archetypes. Otherwise you will be saddled with skills that you probably can't use, because you let the GM roll your character for you and he is a petty and harsh man.
Speaking of archetypes, we don't have a whole lot of balance. Want to play a combat-oriented character? Pick one of the six duties that will give you marginally different abilities as you blow away everyone who didn't focus on combat. Play as one of our three hacking classes, two of which can actually get involved in hacking and one of whom is merely able to suppress outgoing phone calls. Pick one of the two social roles, which basically amount to lying and cheating people with planning, or lying and cheating people without planning, taking advantage of the fully robust but vague social skills system to convince your GM that yes, you can use Etiquette for that.
Alternatively, go to the miscellaneous section, where you too can play as one of the duties that hasn't seen love in a long time, like the Sleever, who can use one of the two drones currently available in play to do not very much to your enemies! Play as the Mechanic, a Street Doc who can't heal people, or as the Street Doc, who can heal people and cyborgs! Play as an Infiltrator to capitalize on the fact that rules regarding security equipment haven't been written yet, and wait to have your character build demolished as the character's abilities are rewritten to accommodate the system that exists as a vague concept in the designer's mind.
Random hit locations result in amusing and humiliating leg injuries! Watch as the GM gives some punk a .50-caliber sniper rifle and prepare to have your roll-roll-clatter left leg blown off in a single hit! Every single shot of combat will result in a magical result of 4, causing the target's left leg to become destroyed long before they face any serious danger, except when the die comes up with a 20 and results in your high-level character taking a shotgun blast in the face. At least they won't suffer long.