I've always preferred a fully voiced hero. In games where every character except yours speaks, it feels like my character is severely handicapped. The best example is the metro series, especially the last part.
It's gotten very annoying. The reason you have a silent protagonist is so you can get crazy dialogue trees, but if everyone else is voiced you're right back to the two or three variations so they can superficially respond then put you back on topic. To be fair a lot of RPGs have done both, I'm thinking Deus Ex and KotOR, but between the new Fallout games, and late era Bioware, it's clearly no longer a priority.
