It’s difficult to individualize the results of any kind of psycholinguistic research to the effect that one individual would feel – the way people react to you is going to be affected by your appearance, gestures, and other aspects as well as your accent.
That being said, I did a study in 1995 on more than 200 Taiwanese and found that they “preferred” (i.e., gave higher scores for personal attractiveness and professional competence factors) a so-called “Taiwanese” accent when foreigners spoke Mandarin, but “preferred” a so-called standard Beijing accent when they thought that the speaker was a Chinese native speaker. (In some cases they knew the speaker’s origin, in others they did not.)
It’s possible that a Taiwanese accent in a foreigner suggests that that person learned his/her Mandarin in Taiwan or has spent a long period in Taiwan, thereby demonstrating an affinity for Taiwan and things Taiwanese (but this is just a possibility).
If you have really bad insomnia and nothing has seemed to help, you can get the text of my doctoral dissertation from University Microfilms and read all the gory details. There are some interesting bits on the guesses Taiwanese people made for national origin when they weren’t told where the speakers were from…however, frankly, I don’t recommend reading it unless all else has failed to put you to sleep.