Pacifien wrote...
Reading fanfiction doesn't help. Honestly, Shepard only has Illium, Omega, and the Citadel available to dock the Normandy if they need to do repairs? Every new character you meet just happens to be from a planet and/or station that Shepard has been to before? The only bar worth going to is Afterlife? Zakera Ward is the only part of the Citadel worth Shepard's time now?
Here's my take on this. The three places you named are the best candidates for a safe port of call for the Normandy in the wake of the Omega-4 Relay mission (assuming the Paragon choice to confound TIM by blowing up the base). Illium has Liara looking out for you and is an asari world to boot, making it more difficult for Cerberus to infiltrate operatives. Omega is also lawless, but Aria runs a pretty tight ship nevertheless; additionally, the general dislike and distrust of humans by its inhabitants also makes it difficult for Cerberus to insert assassins or Saboteurs. The Citadel is also pretty much in the same boat - you have Anderson, loads of C-Sec people, and some of the tightest security in the galaxy (okay, their security's a little porous compared to Illium and Omega, but it's better than some random planet you pull out of a hat). I can't necessarily see an Alliance world being safe due to a possible Cerberus presence. Tuchanka is out because they're hardscrabble enough as it is - there probably aren't enough resources to make repairs to something as cutting-edge as the SR-2. Same for the Quarian fleet (exacerbated by the tenuous political situation prevailing there after Tali's loyalty mission). Which doesn't leave a lot of (reasonable) choice for the aspiring fanfic author.
Now your objection may hinge on lack of imagination/creativity or laziness. That's understandable and I even agree with it - up to a point. But the fact is that these planets and stations have histories or at least descriptions ready to hand. They're readymade hook points for a narrative, with the added attraction of having some basis in official canon. The author can point to a codex or planet entry and say "It says so right here" when challenged about how believable a story element is - something impossible with a planet created out of the whole cloth. Furthermore, fanfiction is supposed to be based off of the familiar, while obviously not hewing strictly to it; otherwise it might as well be a new, original work.
I will concede, however, that Afterlife and the Zakera Ward are too easy as choices. Both games certainly had more than just one bar, and ME showed us enough of the Citadel that Zakera shouldn't be the default location of every Citadel-centric story or story portion.
Just my opinion (in case that wasn't clear enough).

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