I wouldn't lie tho, I've always envisioned I'd meet a chick in her mid-late 20s (educated, starting her career, no kids, works out, etc), which would be enough time for a solid 2 years of dating to commence (without her hounding me about babies) before finally feeling ready to pop the question. (GMB gang would not approve)
But every year I get older without coming across that chick of that age range that meet those minimum standards, I come more to terms that I may either have to look outside my current habitat (different city/state/country) or just reevaluate other things; like if she has all the right qualities but isn't an 8, 9, or 10/10 physically... which goes with what a few of the brehs here were saying earlier.