I don't think I can link most of these, so I'll just give the specific chapters they started looking bad. And yes, most of these are ecchi, shut up.
Aiki Chapter 30 (It's horrible considering how the rest of the series looks)
Zero in Chapter 21 (It doesn't look bad, per se, but I just didn't like how some of the stuff was translated. Reading the dialouge felt a little unnatural) "GREAT FEELING!"
Fate/Stay Night (Whenever Caster show up, I forget when)
...And that's all I got that that I can think of right away. Whether it be English that feels unnatural in normal conversation, or just looking horrible, it saddens me to see a good fan translation turn bad for whatever reason.
Not that I could do any better translating, but I could at least edit it a tad bit better.