I regret not having kids extracurricular activity expenses in the agreement as after the D it was a real pain in the ass to get that one agreed on. At least she agreed to pay for S9's piano lesson and any increase for D7's piano.
Retirement regret - I had 3 SEP IRA's and 1 401K that was used in the big spread sheet of division of assets. Transferring from a 401K would have cost between $700-$1000 to do, so we offered XW a value that could have easily been covered from the 3 SEP's. However, the market was collapsing badly during and following the D. By the time I got the SEP's transferred to her, I still had to come up with some extra cash (minus the tax).
Frank, I hope you both are so very close to getting an agreed upon settlement.