Definitely call pocket over call shot...the last thing I want to do is explain that the cue ball is going to bank off the side rail, make contact with my ball, carom off my opponents ball then bounce around the corner pocket before allowing gravity to finally pull it into the dark depths of victory... 
I wish I was THAT good! But in all seriousness, even having to "explain" the shot to my opponent throws me off my routine...I just want to point at the pocket (at most) and shoot...personally, I only like to call my pocket if it isn't an "absolutely evident" shot (and the same for my opponent)...for anyone who questions me on that one, I don't want to play with them...(only exception being BIG money games...).

I wish I was THAT good! But in all seriousness, even having to "explain" the shot to my opponent throws me off my routine...I just want to point at the pocket (at most) and shoot...personally, I only like to call my pocket if it isn't an "absolutely evident" shot (and the same for my opponent)...for anyone who questions me on that one, I don't want to play with them...(only exception being BIG money games...).