Self-imposed limitations is right.
Why on earth they decided they could not do X, Y, or Z is beyond me. There was so much to explore!
It's like JM and friends were afraid to get out of the car because the parking lot is so big!
There were so many opportunities to cross that line and do something "edgy" like they like to call it.
Case in point, the episode of SGA where Sheppard gets his hand chopped off by Kolya. I hoped it was real, and that when he'd get back to Atlantis he would eventually get an awesome Ancient tech based prosthetic hand that could do all sorts of things like, I don't know, shoot laserbeams out of the fingertips, store data (USB sticks anyone?), interface with computers and gates, pick locks, and be really strong so he could open all the really hard to open jars on the base? Yay, pickles are back on the menu guys!
It would, of course, malfuntion every now and then, download a few viruses and generally be suspected evil because it once squeezed some lemonjuice into McKay's lasagne and it definately knows more about Atlantis than it's letting on. Yes, I'm still talking about the hand.
Okay, my examples are crappy but you get the point. I'm sure they could have come up with some neat stuff.
But of course it turned out to be a dream or a hallucination or whatever.
I don't think that fans demanded they stay within the safe-zone.
It was just the parking lot, you know. It's really big.
And this post will teach me to write opinions on a public forum when I'm half-asleep.