This thread was a great idea. It lets us talk about mods outside of a specific video in our Minecraft series. Don't forget I also take texture pack suggestions too.

I think Evilpoptart does have Optifine installed. I'll have to ask him again, as his video is indeed, choppy. Last I checked it has to do with his Laptop's video card.
As of video set 2, here's a list of mods I want to showcase at some point or another.
1) More of Zombe's Mod Pack (This is called the swiss-army knife of mods after all. It could take multiple video sets to show this mod off.)
-1a) A bukkit anti-wallhack mod. (Zombe's Mod Pack includes a wallhack, and I wanted to use both at the same time to showcase the anti-wallhack working.)
2) Rei's Minimap
3) Nxt Health Bar
4) Mine Little Pony
5) Optifine (From my end.)
6) Exp Bottles (Mod that lets you fill bottles with your own exp.)
7) Too Many Items

Worldedit CUI
9) Improved Chat
10) Water Shader
11) Void Fog Remover
Most of that list was composed from this:
http://fyreuk.com/wiki/server-info/suggested-client-mods/ and looking briefly at Bukkit mods that caught my interest.