I also have lots of rifles, but try to stick with the same brand or at least ones that have the same safety location/operation. Scopes seem to be a special problem; however, since, when walking around with a varmint rifle, I may forget to adjust the AO for a shorter range, and/or turn the power down.
All my deer rifles are bolt actions and have 3-9X scopes, two are Remingtons and one a Tikka, but all have the same safety location/operation. My CZ .22 magnum "walk-about" (non-deer) rifle has a "reversed" safety operation that bugs me, but am fairly familiar with it now, but usually turn it on and off several times when in the field, just to become fully comfortable with the "backwards" operation.
People are like rifles. Some are tried and true, having great eyes, personality, and fun to be with. Others never seem to hit the mark with you. Still others go off half-cocked. Still, it's nice to know most of them.