I guess I can summarize what I believe everyone here is saying in the comments: both episodic and editorial have their pluses and minuses. Some posts have elements of both.

And my stance? I agree with Fuyu. Read what you want. Write what you want. Blogging is free and fun. It’s a hobby. I don’t want anyone to tell me what to do with my hobbies so it’s the same scenario here. In the words of one of the best villains of all time, the Joker: “Why so serious?”
Minnie’s last blog post..Eden of the East Episode 2: “As Long As You Have Money, There’s No Difference Between Adults and Children”

Anyway, my response to the episodic vs. editorial debate is always the same. Episodics everywhere gets boring to read, but it’s often the easiest thing to write, at least for me when I have the fangirl power behind it. Otherwise for editorials you have to come up with one topic and a lot of random observations get ignored (this is why my Shugo Chara posts are waaay too long, everything gets included).

To me the answer is just to write whatever your heart desires and to read whatever you wish to read as well. Though oddly enough I usually read more editorials after a season gets started. I think that’s more because I don’t always watch an episode ASAP and when I do get to it, it feels weird going back to someone’s old post when they’ve done 3 or so since.

FuyuMaiden’s last blog post..Weekly Extra – The Cold from HELL

As a relative noob, I do want to note one thing about episodics. Similar to what warriorhope mentions, because you’re committing yourself to a steady stream of writing, I feel like it’s really the best way to learn and refine your “voice.” And the one thing that really good editorial blogs have is a very distinct voice. While some folks, like ghostlightning, may be naturally gifted and have a compelling voice right from the start, I think for most others (myself included), we find our voice and refine it as we go along.

RP’s last blog post..Kurokami: Black God, episode 12 – Something semi-witty goes here

warriorhope’s last blog post..07-Ghost-Episode 2

As for the newbie bloggers (stop staring at me!) –> episodics trend, I’d say that’s the result of two things:
1) It’s known to work for a few blogs (RandomC, Star Crossed, etc.).
2) You don’t need to think of what to blog about.

fangzhao’s last blog post..The three guys met : an alternate interpretation of School Days

The more successful ones (I don’t mean just aggregate traffic and comment volume) will be those who attract the best commenters (those who themselves have interesting things to say about the anime – perhaps non-episodic bloggers themselves who use the opportunity to talk about shows on an episodic basis), and these will be people who I think who network a lot and have good ties within the sphere.

I don’t write episodic posts because I don’t have the skill and stamina to keep things interesting, and I don’t have the energy to get people to gather in my comments section to talk to each other about shows given that twitter, IM, IRC, and forums provide a similar service.

As for editorial blogging, one can really talk about anything – and this freedom is quite enjoyable I imagine for other writers aside from myself.

ghostlightning’s last blog post..Keeping it Real Robot