Just pick an rp and fire away. If you have questions, send a PM to the OP and he/she will provide you with details and current events so you don't have to read through potentially hundreds of pages.
Indeed. And if you'd like more info on 'using your character', I recommend asking either Burning Brawler or Khellendrosiic. The former has taken on the job of roleplaying contact with the City Scoop, so he's always a good source of advice when it comes to this, while the latter has created a few very excellently developed robot characters. 
"If I had Force powers, vacuum or not my cape/clothes/hair would always be blowing in the Dramatic Wind." - Tenzhi
Characters
I have a few "robot" characters myself.
Each of them has a "personality quirk" in that they act a specific way.
Ryat66 acts the Fool. His personality is almost the literal embodiment of the Tarot Fool.
Ryat99 is morosely serious. He tends to avoid emotional outburst (something his inventor wishes he could do) and has recently worked out the kink in his programming that caused him to say odd phrases, like "Are you the Messiah?" and "Is this the line to Reno?"
The question is largely what you want your character to be like. Is it like Star Trek's Data, where you're constantly trying to achieve a semblance of humanity? Or are you like Bender, apathetic to emotions, and callous to all who don't fit with your selfish needs (should be "wants," but when you're selfish, it becomes "needs")? Were you built to serve and enjoy helping, or do you despise your lot in life, hating to serve, but compelled to anyway and constantly seeking a way to free yourself from the bonds of your firmware.
Also, I suggest playing with your character more in-game. Sometimes, the moments you go through or your overall playstyle will provide you with serendipitous insights as to the behavior and attitudes of your character.
My Stories
Look at that. A full-grown woman pulling off pigtails. Her crazy is off the charts.
That's somewhat my problem, the concept I have puts her in a very very odd spot, she was literally given birth to, but is technically a machine in that her cellular structure and the entirety of her being is manifested of nano structures which are...well....artificial.
Her brain works pretty much exactly and moderately beyond that of human beings, given it maps perfectly the way the brain grows, makes connections, and interacts, but it also is fully capable of interfacing with nay machine and tweaking with it on any coded level.
Her mind does not have any kind of software or AI program to make her what she is, though she does have access to an immeasurably massive database on demand to which she can constantly and instantly translate to and from.
Herm....put simply, she's not quite a robot and not quite a human. Idling somewhere in between purely because she does in fact have a unique personality that was not coded into her in any way beyond her "genetic structure" which was in fact a tweaked clone from the mother being which split it's own cell to fabricate an embryo cell, creating a truly unique being that wasn't simply manufactured.
I have her bio in the thread here.
http://boards.cityofheroes.com/showflat....e=0&fpart=5
She's a bit of a traditional logic breaker. :P
Oo! Oo! she's like Roll from Megaman only with a bit of T-1000 stuck in there
You can't spell Slaughter without laughter
All your gonna do is just farm behemoths anyways.
My thoughts on November 30.
Sounds like an excellent avatar of Joule.
In any case, it seems as if your character could act just like any normal person. She'd just be a little confused when she found out not everybody has access to the massive information database like she does.
My Stories
Look at that. A full-grown woman pulling off pigtails. Her crazy is off the charts.
Oki, I have posted a character concept for a robo-girl...it...thing...and was wondering about (since I've never really done this...) how I might be able to go about using that character and the premise I have for her to create a story or rp with her in it.
My character is the Myou one in the character thread, was kinda aiming for removing any possible remaining difference between people and machines, might have gone a little far with her, but at least she's truly one of a kind... >.>