I have a few, my fav is Jessie Gender, who gives insightful reviews but doesnt shy away from criticism of Trek. I also like how she looks at things from a gender critical angle, which is something few peoppe think about. Sean Ferrick is another cool one, as are the guys from Trekyards who are more focussed on tech and ships. Who else should I look up on?
Greatest Generation is a great trek review podcast that does ep by ep reviews of each series. Lot of potty humor and gimp jokes, but it's not that bad. Hard to explain, but worth a listen.