Since were talking about aiming mods there is only one that I will ever need to install. It's called the iron sights. Awesome mod that lets you use your gun sights to aim instead of zooming in a tiny bit. Here's a video of it in action. This is an absolute must install for me when playing F3.
Thanks skavenhorde, that happens to be one of the mods I wanted to try when I start FO3 again, which I plan on doing very soon.
Did you ever experience any glitches with it? I heard they had to tweak the gun models for that mod to work properly.