Here's my take as someone who actually has an RPG Maker game with voice acting in it (
Close Your Eyes).
Do it if you want to, but keep in mind what you're wanting people to experience in your game. In Close Your Eyes' case, I knew I wanted voice acting and to give it a weird mood to set people into a certain minds cape along with using original music and the like to strike an odd atmosphere. I also knew I wanted a sort of patronizing host figure for the game, and the role worked a lot better when I voiced it. Another key thing is the voicing gets progressively more sinister as the project goes on... this Steam review reflected what I was hoping the voice acting would achieve perfectly:
"And while I was on the fence for the game show host's voice at the beginning, his voice got darker and darker, until it sounded like a demon's low purr whispering in my ears. It was dreadful to listen to, so good on him. That man has some true talent at sounding horrfying."
It did pay off as the voice acting was heavily praised by a lot of people who played it, in fact it was one of the consistabtly praised elements. But I knew exactly why I wanted voice acting, what it should accomplish and tone, why it would add and not take away, and knew I and a friend (who voiced a female character) could deliver on it as we both have done voicing things in the past.
If you just want it and don't know how it fits with the overall vision of your project, I think it'll suffer for it.