We used to mulch, but most mulching kits do not work that well.
Grass gets all clumped up, now we side shoot and it works so much better. just have to be careful about vehicles, people and beds not to shoot the grass at them. You'll have to find the right set of blades for your mowers that work best by not shooting to much grass like gators or mulching type.
I like to side discharge. I use double blades or Meg-mows so it chops thins up and spreads them out really well. And the biggest plus is I can switch to bagging in no more than the time it takes to hang the accelerator on the side. I hope to add an OCDC this year so I have even more options.
I must be missing something because I can't imagine NOT having mulch kits on my mowers,unless,of couse,I'm bagging.Personally,I don't like to leave any cut grass showing when I finish mowing and that's not possible without a mulch kit.Also,leaves and other debris(unless it's real heavy)virtually disappears.Before installing mulching blades I could go over a lawn ten times and there would still be cut grass showing.Sometimes,if the grass is real high I might have to double or triple cut to eliminate all the clippings but if I cut weekly it just takes one pass.I have mulch kits on my JD mowers.
ALLSTAR - You are not missing anything. Mulching works for you in your area of the country, Here in the North East 'I' find it easier and more productive to use the Side Discharge as 'mulching' really slows down mowing speed and in most cases results in turning the mulched clippings into mush. Not to say never mulch in this area, when the Spring flush of growth settles down and we get into Summer grasses mulching is an option just one that I choose not to use.