Usually a parent would have the job of deciding during their youth where to go and as a result will have a better idea of where he wants to go for adult learning. What do the sources have to say about how to go about finding and choosing the right yeshiva for someone who didn't have the benefit of growing up with a Jewish education?
The main sentence is that "אין אדם למד, אלא ממקום שלבו חפץ" (A person can not study Torah, unless from a place that his heart wants) [Avoda Zara 19 page 1).
So as long as it is a yeshiva that coinsides with the Halacha it is good! Also if you tried it a out a little bit and liked it than better!
Of course there are pros with every type of Yeshiva that are pretty objective. If you ask about Israeli "Dati Leumi" Yeshivas I can give you some main ideas of each one (in the comments).