@SoulfullyAButterfly My favourite yoga pose would be purna-bhujangasana (full cobra pose). My mother used to make me do it when I was little, so now it's actually really easy for me to do. I love it because it gives my whole body a stretch, because I'm easily able to hold it for a long time and since it help my body relax.
Yoga-related benefit? I dunno about traditional yoga, but for what we generally call yoga, I guess flexibility. I mean, I only do yoga poses as exercise to try and get a little more flexible. I don't do any real yoga with breathing techniques and stuff.