I am not sure, Todd seems to be the most entertaining one lately, I like Linkara too, but don't watch him frequently because I get tired of him after a while but I always end up coming back, his History of Power Rangers is awesome BTW I don't get tired of that, watched it all in 3 days, because Power Rangers is awesome, but I hadn't watched any season after Lost Galaxy which made me quite the show, but if I had known that LSR was so awesome I would have watched that, anyway that's a great way to know which series of Power Rangers to watch, not because he tells you, but by watching his recap you can tell if it's you're style or not, for example Dino Thunder and LSR are totally the kind of Power Rangers I'll watch, while Ninja Storm and Wild Force are what I won't, waiting for his next one to see if whatever series comes after SPD is the kind I'd like.
Also I quite like Nicolas Freeman [small](YRulerOfTime isn't a very catchy name though)[/small] and his stuff comes out far enough from each other that it's really hard to get tired of it, and I don't even read Manga and I still watch him.