While each sign or planet combination will have it's own style, you can't really say one is attractive and one isn't, that will probably depend more on bad aspects which cause disharmony or challenges.
But it's like with physical attraction, there is a standard of beauty and that is
e.g.
jawlines and higher cheekbones with sunken cheeks are attractive, fat cheeks and double chins are not
straight teeth are attractive, crooked teeth are not
the attractive side demonstrates better health and facial musculature whereas the unattractive side demonstrates poor habits and musculature
So, healthy virgo rising and whatever other planetary placement = attractive
and an unhealthy virgo rising, maybe one that has bad aspects, which can sometimes be a challenge to overcome (think of the ugly person in school who transforms into someone beautiful as an adult) can possibly mean unattractiveness.
Now after that, the eye of the beholder lies within that healthy sample
i.e. of these healthy virgo risings, or healthy pisces risings, or healthy mars and saturn in capricorns... what style do you like?
Difficulties in attracting people, that can be another thing which may have nothing at all to do with how attractive you are. It could be about beliefs etc.
Virgo being typically seen as the perfectionist sign, can help lend to the 'why' of why someone would experience difficulties in attracting. Pisces rising on the other hand, if they found it difficult to attract someone, could have something partly to do with being escapist and not facing responsibilities of having to date etc.