Bit late but for what it's worth I've fairly recently swapped to a lower bench. I'm 176 cm on a good day, and built the first bench at a hair under 38 inches. It served me well for ten years but did sometimes feel a bit awkward sawing in the vice, lining up dovetails etc. The height was less of an issue for planing (though still a slight issue) than the fact that it was extremely short in length (4 footish), not flat enough, and not heavy enough, and the vice was a bit too small. It also ocassionally doubled up as an improvised lathe.
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With a bit more space and more work planned on a larger scale I decided to try a new bench and finally build a vice for a wooden screw I'd had sitting around for years. The new bench, based on Richard Maguire's "English Workbench" plans, ended up being a hair under 3 ft tall (92cm) and about 6 3/4 ft long.
It's been a pleasure to use so far but it's hard to tease apart how much of that is due to the fairly negligible difference in height, although it helps a lot with planing on the bench top, along with a proper planing stop rather than trying to plane in a vice. The vice itself, despite freezing up a bit over winter, is great to use. The greater capacity, grippier grip plus the lower height make a huge difference when ripping stock down by hand and fettling joints. But it was a faff to install with making the garters, handle, boring large diameter holes and the rest of it. Good fun though.