Ascended Fanboy: ERod admits to be a fanboy himself and started doing reviews with hopes of being part of That Guy with the Glasses and made some videos parodying the site didn't pick him yet. He eventually succeeds.
Also his reviews are more in the fanboy approach before as a media critic. He stated more than once that he's a proud fanboy/geek.
Man Child: Often rampages about nostalgic movies and series being ruined by Hollywood, but the biggest fact is that he still plays and voices with his dolls, I mean, action figures. Lampshaded in the Channel Awesome Holidays greetings.
For Cars 2 review, ERod says Bruce Campbell playing a character named "Rod" is greater than the greatest day of his life: meeting Donald Duck at Disneyland.
ERod: *After hitting himself after a WTF moment* Was Sarah Michelle Gellar here?
Also for Cars 2, he gets over excited when finding out Bruce Campbell had a role in a Pixar movie playing a character named "ROD", almost part of his own name.
That immediately crashes when the character is killed off after a brief appearance.
Unknown Rival: ERod has been claiming Linkara copied him in many occasions even before he got into That Guy With The Glasses and has been declaring Linkara as his rival. Linkara, of course, wasn't aware of this at all and, only after ERod finally told him this in the crossover, Linkara set this as an extreme coincidence due to both of them being Not So Different.
Allergic To Girls: Poor Nerdlinger. He's so vulnerable to scantily clad ladies that he covers his eyes at best and downright faints at worse. He even faints at the only mention of Obscurus Lupa name and poster.
Characterization Marches On: Compairing him with his first appearance in the second episode, Nerlinger gradually became more energetic and showed a wider range of emotions compared to the other characters in the show.
Last Name Basis: You don't find out his full name until nearly 100 episodes in.
Overly Long Name: (Borderline example) Eustace Xavier Aloysius Nerdlinger the third.
Limited Wardrobe: Beige backwards cap, taped glasses, turquoise button-up polo over a white long sleeved top, and black tie.
Lovable Coward: It causes him no end of grief, since being the resident expository nerd makes him ERod's go-to guy for information on many franchises, including horror franchises, so he gets constantly exposed to scary stuff. Just as much as he knows about characters like the Terminator and the Predator, he can't see their movies without being on the verge of a horror-induced fainting spell.
Man Child: For Gulliver's Travels, he's shown playing with his action figures and Lupa (BtVS's Willow doll) is the ultimate hero.
Mister Exposition: When ERod needs to explain details about a movie's background or the plot of previous movies, he often calls on Nerdlinger to do the honors.
Nerd: He's an interesting subversion in that the other characters in the show do not put him down for being a nerd. ERod himself actually calls on him to explain nerdy or fan-specific information, so he's also the show's resident smart guy.
El Lover: Milla, Milla Yoyovitch, *pointing to lap* I got a big gun for you right here that you can borrow, baby. No, seriously, *lifts a large firearm into frame* I mean you can borrow this; I don't want to see you get hurt.
The Ace: In a twisted sort of way. Fedora Freddy is an idea guy for movie executives looking to create crap movies that still make buttloads of money. Fedora Freddy basically fast-talks horrible plots into existence... and the movies make buttloads of money.
Sassy Secretary: Even thought she never talks, Nurse Cause has this interaction with Dr. Affect: Gets annoyed by him giving her orders, beat him up with a plutonium piece because her Eye Candy was cut off, and flirts with ERod every time she's near the video-call.