I serve better with extended, my wife too.
I get TE way easier with extended. Close to body manouvrabillity is affected. Rech is awsome - I can't get passed or lobbed at the net with a 28". However, if the shot goes into the boddy... SHBH doesn't like it much either.
I mostly play with 27", but have few 27.5 and 28 too. I need to find a 29" for an experiment.
On the side note, it is interesting that 28" frames often have some monster SW and very HL, compared to a 27" of similar specs. Yet, somehow you don't feel that heavy SW to the full extent?
It's never too late for a happy childhood!