I could have written Chris22's post about a decade ago. We have the same issue with the MND calculation methodology -- we have never saved less than a good 25% of income, but we had a fairly recent period of dramatic upward trajectory that means that all of that prior savings represents a much lower portion of our current income (and we also live in a higher COL area now than for many of those years, so our projected RE are higher than we would have guessed then, too). We also had significant home remodel/garage expenses that came along with my preferred neighborhood, but it was worth it to me to have a short commute and allow the kids to walk everywhere.
Also agree about the impact of taxes -- ours are close to 50% with federal/state/local.
Current savings are @46% for last year; I hope to do better this year. Figuring out our spend/savings is a little difficult in advance because we both get a significant chunk of our income as annual profit-sharing/bonuses/etc., all of which is not guaranteed and can be highly variable (we made $100K less in 2016 than 2015). So part 1 of my savings plan is always to live within the normal monthly takehome, so that the end-of-year is pure savings.
Part 2 of the savings plan is then the standard savings out of the monthly take-home -- 529s, EF/car fund, and extra post-tax investments (Vanguard). Then part 3 of my savings plan is my "game" to manage DH's spendypants tendencies (he would probably be fine with putting away 15% and working forever) and, honestly, my own temptations. Over time, I have sort of learned to pre-commit a lot of our monthly outflow to "useful" stuff so that we don't have a whole lot left at the end of the month to fritter -- IOW, I make sure our monthly budget "feels" tight to control the frivolity. :-) So every year, if we get raises on the base pay, I up the Vanguard so we don't see it; when they gave us that FICA rebate, I added that to Vanguard, and then just never undid that when it went away; this fall, when DS leaves daycare for good, I will again add the delta to Vanguard; etc. We also refi'd to a 15-year mortgage on our primary home, which increases the monthly outflow but means we will have no mortgage in retirement. We also bought our retirement condo after the crash and are paying off that mortgage out of cashflow (we are renting it out, but it's slightly cash-flow-negative). I see both of those as "prepaying retirement expenses with current high cash flow." Yes, I know that over time the returns would be better if we invested that money, but DH thinks we are already saving enough, so this way at least the money goes to something that I think is useful.
My own personal failing is eating out/doing takeout, or cooking with fancy ingredients -- I have always been a cook and enjoy it, but with two jobs and two kids, it gets very tempting to say "eh, we can afford it," and suddenly you're spending $1200/mo. on groceries and takeout. I am cutting this back significantly this year, because it's just sheer laziness, and I don't like that me. We do also like eating out, and I am not willing to cut that out, but I am cutting the frequency back, because it loses it's special-ness when you do it too much. DH's current fixation is wine (he has amassed a couple hundred bottles) -- mostly it's not fancy stuff (our last purchase was $14/bottle), it's more that I have very limited taste in wine, so when he finds something we both like, he buys a case. I semi-rationalize this as more prepaying retirement expenses, as we are currently buying more than we drink, so I'll have a nice stash to "spend" down in a few years. :-)
We also spend too much on travel, but this is an area DH and I agree on, and in fact a large part of the reason why our RE budget is higher than most is because we are planning to do a lot more of that. I also like cars. Always wanted a convertible, so after we hit FI, DH convinced me to buy one (didn't take a tremendous amount of arm-twisting). At some point, we may buy an even stupider one, but for now our daily drivers are a 9-yr-old TL and a 6-yr-old SUV (both of which I got deals on).
What we don't worry about is keeping up with the Joneses. Probably the best move we made was to buy in an area where our income is maybe double that of those around us. So we can live a very nice lifestyle without constantly being surrounded by lots of more/better/fancier (I believe there is one Lexus on our street -- and that is in the next block), and our kids don't have friends who are always doing super-swanky stuff. We do spend far more than we need to, but it is on things that we get enjoyment from, and we could cut back significantly if necessary.