For a trip of, say, 6 nights and 6 days' worth of meals (arriving before dinner on day 1 and leaving after lunch on day 7), we'll have 4-5 TS meals and 7-8 CS meals. (*I'm counting meals at lounges, or assembled piecemeal from festival kiosks, as CS.)
We'll do one TS meal most days, and it's typically lunch (except for our last night, when 'Ohana is a dinner tradition), in order to allow for maximum flexibility during the evening. This was a lesson we learned after our first WDW trip: too often, we finished with a park earlier than expected, but had to traipse back to it after our mid-day break just for a dinner ADR, when we'd rather be elsewhere.
The remaining meal each day (lunch or dinner), as well as all meals on our arrival day (no need to tie ourselves down with ADRs in case of travel delays) will be CS. We are light eaters in the morning and we have yet to find an onsite breakfast that we felt was worth the price, so breakfast is always cereal, granola bars, fruit and/or a Pop Tart, enjoyed in our hotel room from a stash of food and picnicware we bring with us.
Although we always allot money for "1 snack per person, per day" in the parks as well, we only end up getting mid-afternoon snacks about half of the time, as even the CS meals are so filling that we're generally not hungry again until dinner.