You can still work on Interp and Presentation. Most people talk in a monotone with very little expression. Announcers/Presenters are pretty much the exact opposite. They have wild swings to the pitch, force, and expression in their voices and that's why they still get paid to stand in front of a microphone. It's hard to (a) do that in software, and (b) "filter" someone's voice so it sounds like that.
Pick a voice you like and record some. Do you like Don Lafontaine?
"In a world that knows no limits, one man and one woman strive to." etc. His "In A World" thing is a standing Hollywood joke, and he's in on it. He's recorded some spoofs that are drop-dead funny.http://www.milton-rotary.org/automobile ... geico-spot
PBS has a presenter with a sucky voice, but he gets work because he does his Lafontaine Simulation, even with the wrong voice. BBC/NBC/News presenters play straight, but have pitch swing and interpretation. Nothing like recording on a murder with a comedy voice.
Etc. You can do that on any microphone.