What is the most attractive font in common use?
What dose no one have an opinion?
Commonly cited as the most popular is Helvetica.
Ah thank you.
There is no answer to this, given how subjective the question is. It's like asking "What's the best colour?"
Right now, I have (scurries off to check) 1512 active fonts installed on my system. I like some of 'em better than others, but they all have their uses and even the unattractive* ones will sometimes be exactly what a design calls for.
*Unattractive to me. There are objective metrics by which a font can be judged 'bad' (the terrible kerning in Comic Sans, to pick a famous example) but, beyond that, it's all a matter of personal taste.
Jim makes some valid points but I would also add in that there is the psychological dimension of font choice to consider. There is actually quite a bit of research out there into this issue.
So 'attractive' is also related to issues around purpose, audience and context.
Reading up on why Comic Sans is notoriously loathed (https://designforhackers.com/blog/comic-sans-hate/) is quite informative.
Food for thought. When I work out how to do it I might show examples and ask for opinions.