Voice acting can absolutely make or break an anime. That's why so many people like watching anime with the Japanese voice work and the English subtitles. That way they don't have to hear the English voice actors, which can sometimes be less than stellar. That's not to say that all English voice actors do a bad job, because there are many out there that deliver spot-on performances. Anyway, we're looking at voice actors for anime, and the language they speak in doesn't matter. It's their portrayal of a character that does.
Like I said above, a voice actor can really make a character come to life. The right line delivery, inflection and pacing can really work wonders when building a story. Voice acting should pull you into the story and make the character believable. Further still, there are some top-tier voice actors that really reach out of the TV and make you fall in love with their approach.
For me, Mamimi from FLCL is one of those character portrayals. The voice work is done by Jennifer Sekiguchi. While Mamimi may not be the biggest character in FLCL, her line delivery really makes the character stand out. She has such a cute, innocent, and a little bit deadpan delivery that absolutely nails the type of character that Mamimi is. There's a lot of great voice acting in FLCL, but it's Sekiguchi's work that has really stuck with me. Some might say that her work has given me a little bit of a crush on Mamimi!
What voice actors from anime really make you smile? We're talking about characters that wouldn't be the same without a specific voice actor tied to them. What voice portrayals really seal the deal for you?