I’m a bit of a nut when it comes to such things, so I’ll restrain myself a bit. But I thought I’d offer this for those who are interested: the (so far) most influential translation of the Yoga Sutra for me has been this one by Chip Hartranft.

The Yoga-Sûtra of Patañjali

He’s kindly made it entirely available for download, so I keep a pdf on my desktop. That allows easy text searches, even when I’m not on line.