We all use Lync, but explore another one of the other options and comment/blog your findings.
AdobeConnect seems like a popular options for hosting online video conferences. I’ve never hosted anything on it, but from a participant point of view, I like that you don’t need to sign up or download any software, you just use the link to open in your web browser. I once got caught out trying to connect to a session hosted on BlackBoard, thinking it would be just like Adobe Connect, not knowing I had to download and install the software first, which on my computer was going to take over 20 minutes and I only gave myself 5 minutes to get set up! But I blame that entirely on my own disorganisation.
I haven’t used Skype in a long time but it’s functional too (according to the Wikipedia article, Lync is now called Skype for Business! Hmm.)