I had planned to write something about the Borderlands series, but that will have to wait. I have something I need to get off my chest first. It's very personal, and I hope the two or three of you who follow my sparse blog will spare me this moment.
I joked in my review for the bizarre...
Don't stay in one place for too long if there are snipers about.
You can jump back towards walls you've already jumped off to avoid obstacles.
In the end-of-level scraps, take out anything with a gun before you deal with the others.