Personally I like fixed power scopes, just a bit more rugged (though not as much of an issue with high quality scopes like US Optics), but more important, one less thing to worry about in high stress situations. Also, if you are an avid mil-dot user, the variables can cause slight inaccuracies (which already added to human inaccuracies....) This is because the mil-dots are only accurate for ONE power setting, and with a variable power, how do you know if you have the scope EXACTLY on 10x, and not 9.9 or 10.2, etc. If you dont' use mil-dots much, then dont worry about it!
Besides that, its very handy to have the flexibility of variable power scopes.
MEL
Besides that, its very handy to have the flexibility of variable power scopes.
MEL