I do like a selective trigger on a dove gun. I shoot doves a lot, and am constantly trying to improve my technique and averages. One of the things I have taught myself to do is take incomers earlier than I used to. In Argentina I experimented a lot and learned just how far out a 7/8 oz. load of 7 1/2's or 8's will down an incoming dove out of a light modified choked 20 gauge. I normally keep a LM in my left barrel and a more open tube in the right. If the birds are incomers I switch to fire the left (tight) barrel first and can down the first bird in time to double with the second, as the birds get closer, with the more open right barrel. If not incomers, I will switch back to the right barrel first, then the tighter left.
However, this is the only time in the field I have ever had any real use for a selective trigger.