Well, as a LPer, might as well give my thoughts too. As usual, this is just my opinion and it may contradict others.
To be honest, it doesn't affect me too much actually. Here's why.
With Narration
Pros
- Sounds fun
- You get to hear the player's thoughts
- You get to feel the emotions of some characters in the game if the person acts that character out.
Cons
- It may get annoying sometimes.
- If you really need to listen to the game's audio, the narrator's voice may block out what you are hearing.
- Let's not forget on the let's player's perspective, he/she has to do more work by talking and such (It doesn't affect me, but to some, maybe? I don't know)
Without narration
Pros
- You get to observe gameplay and you can sort of feel how it'll be like if you really played it.
- It works almost like a walkthrough (EXCEPT if you are watching someone that stalls for like, 5 minutes at some certain point... Well the player should fastforward that scene XD )
Cons
- May get boring, a little, maybe a lot too.
- You'll think it'd be better of playing it yourself, exactly like what Ksi said. ^^;
I'm not a fan of the no-voice LPs. If I wanted a no-voice LP I'll go play the fricking game myself. :/
Just my opinion! But to be honest, once again, reiterating, my opinion! I prefer watching LPs with webcams! Why? Well, not because the person looks cool or sexy or whatnot, I don't care seriously!
The reason is because when you record yourself, it's actually more lively because you get to sort of see how the player feels instead of just, listening. When you see a player's reaction going wild and like, "WADDAFAQ?!" And whatever, it's actually more hilarious than just listening to the player without their reaction. It feels a little, well, lifeless to me? Maybe it's just me! ^^;
But of course there are cons, I know, not everyone is courageous. Not everyone has a great webcam. To be honest, I am using my laptop's webcam, which isn't truly awesome at all! It can have problems, not every time but I'd say I'd rather do it than not do it at all. And also, if you don't like exposure, then well yeah, I can understand why. It depends on the player whether he/she prefers it in what way. Not to mention that I have that dramatic attitude where I scream and go, "ARE YA SERIOUS?!" and not everyone has that kind of attitude! Even if you had a webcam and you just play like, well, poker face all the way and not commentate, it's not going to do much, unless you are acting it out.
Overall, it just depends on what the viewer wants. If the player wants to see gameplay, watch LPs that are voiceless. If the player wants something more entertaining, watch LPs that have voices. It is all up to the viewer and there is no which is better. After all, not everyone in this world is identical so there will be a clash of thoughts and opinions so no matter which way you slice it, as long as you put in effort into whatever you do, people may like it!