What do you like about their age separations? Is one set currently closer to each other?

DH and I are nearing the time where we need to decide if we're going to try for a third.
DD1 & DD2 are 28 months apart and we would like the same 2-3 year age gap between DD2 and a third, if we have a third. As it stands now, IF we started TTC and immediately got pregnant, DD2 and #3 will be about 26 months apart. Which means DD1 and LO3 will be almost 4.5 years apart.