Glen Valentine is an asset to any birding group with his excellent knowledge of birds and his friendly outgoing personality. He is helpful to both experienced and inexperienced birders alike. I would not hesitate to join another birding tour where he was leader or co-leader as I know from experience that it would be a thoroughly enjoyable and informative tour.
Some destinations are not only great for birding but also incredible for animals or for exploring unique cultural elements. Are you traveling with others who enjoy a mix of birding along with other aspects of travel? These trips are right up your alley.