Any type of lift will increase your center of gravity. Of course, there are ways to combat that problem such as chopping the top and moving weight to a lower point on the vehicle (Rookieshooter's BII was a perfect example).
It's all in what you want though. I did a 2" body lift on my choptop partly just because the price on it was right and I suspected it might help me with some clearance issues when I build my winch bumper (of course, now I'm not so sure my idea will work anyway, but that's another story). I don't really care for the gaps that BLs cause, but a 1-2" BL does give you more room to work without looking too crazy. I saw a lifted chevy the other day that must have had about a 5" body lift... looked terrible... I didn't get close enough to find out how he did it, but when you can see cars between the gap from the body to the frame.... it's not good.
Now, another little thing I found with my choptop.... when I built it to it's current height (2" body, 5" suspension), I put some 33x12.50 bias ply tires on it. It was surprisingly stable like that too. Then I stuck some 31x10.50 radials on it for awhile because I didn't want to chew up my 33's while I was DDing the truck... after about a week of that I put the 33's back on... it was scaring me trying to drive it with those lil tires. I believe the wider tire was adding stability.
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