My ambigrams tend to be carried far enough to show that the idea works, and no further. My main aim is for legibility, so I tend not to add fancy backgrounds or Photoshop effects. I'm not into ambigrams-as-tattoos, and I'm not a talented enough bezier-wrangler to do designs full of calligraphic siwrls (besides, I think they tend to mar readability anyway).
John Langdon says "When a word or a name you're trying to make into an ambigram seems impossible, or if the result is too hard to read or hideously ugly, don't call it an ambigram. Call it trash and throw it away." I think too few budding ambigrammists take heed of this: also that the fraktur style shouldn't be your first port of call.
Eyes used to modern roman serif/sanserif/script types find blackletter text styles hard enough to read to start with: some words/phrases may be complex enough to ambigram that the only way they will make a design at all is in blackletter, but there's no need to force yourself into that corner before you've explored more readable alternatives...
Basingstoke ambigram dtw42 2 0 Thirteenth Doctor - Jodie Whittaker dtw42 2 0