Aluminum Christmas Trees: "Meredy" has had many people assume that her name is a "Blind Idiot" Translation of "Melody". (Not helping is that "Meredy" gets dinged by spellchecks). "Meredy" actually is a real name - a derivative of "Meredith".
Americans Hate Tingle: Much like Annie, Keele is despised overseas for being an arrogant, racist asshole. In the Japanese version, this is mitigated by skits that show him defrosting towards Meredy as the plot progresses, coming to care for her. However, since skits were cut in the English localizations, Keele instead remains dismissive and rude towards Meredy and Celestians as a whole until the very end of the game, where he seemingly turns 180 and decides he cares for Meredy and wants to stay in Celestia to be with her. Many players felt this was too little too late and that his Bishounen looks and tragic backstory didn't do enough to redeem him.
Good Bad Bug: There are two particularly famous ones. The first being the "Jump Cast" glitch where by jumping and then rapidly shortcutting to a spell, the magic user you're playing as would rapidly cast said spell for little cost, making certain battles much easier. The other is the "Move Scroll" glitch where by using the scroll feature on your skill lists when they had more than one page, allowed you to access attacks and spells that the character normally wouldn't be able to use. Having Reid with Prism Sword for example, a spell which is only usable by certain bosses. Sadly, the first glitch was fixed in the PSP port, but the second one remained, surprisingly.
Growing the Beard: This is where the Tales series really started to pick up, particularly with the battle system. Things were sped up considerably and all spells are now performed in real time, allowing you to chain your artes with the mages rather than have them serve as damage and distraction. The game also introduced a degree of character customization in the Craymel system, two worlds with considerably different world maps, and much more character development. Tales of Symphonia and Tales of Rebirth are much more obvious examples of beard-growing in that the former started the Deconstructor Fleet and the latter started making them Darker and Edgier, but they both, in turn, owe a lot to Eternia.
Low-Tier Letdown: The AI-controlled Chat. Due to Artificial Stupidity, she tends to dart in dart out, and doesn't always use the right abilities. Plus, she needs someone like Reid serving as a distraction.
Porting Disaster: In the EU version of the PSP port, the voice clips got mixed up or untranslated, resulting in a nice load of Narm during some cut-scenes. Also, some copies of have a bug that causes the game to crash after the battle with Volt.
Retroactive Recognition: In the English dub, the main protagonist, Reid Hershel, is voiced by Kevin Miller, who is best known for voicing a thieving raccoon.
So Bad, It's Good: The voice acting in the English version ranges from "They at least sound like they're trying" (Reid and Meredy), to utter lack of care territory (nearly everyone else, with Farah being the worst offender.) This is usually very funny and hammy, although some people get annoyed that Farah's VA still isn't giving a damn even during her bigger plot reveals and emotional moments.