Matthew Tongue's self-appointed role in the trifecta is Logistics: he sees it as his job to make sure things runs smoothly, from calling up PSAs and playshelfs to getting the phones to work. You'll notice he usually fails at this, but he enjoys it anyway.
Matthew hates talking in the third person, but he is jealous of CJ- and Kyle's profiles, so he feels he must emulate them for success. Let's see...he was involved early on in coming up with voices--most notably the standards for the Hork-Bajir, Taxxons, and Andalites. He also greatly appreciates the work of people who worked on the books (and ye, even the television series) and holds all Animorphs-related activities in the highest regard. He also takes nothing seriously, except taking nothing seriously.