For me, I actually try my best to separate voice actors from the characters they voice. I tend to immerse myself fully in the story and the character's personality while playing otome games. If I keep thinking about which VA is voicing the role nonstop, it just pulls me right out of the immersion and ruins the vibe.
Normally I pick games based on the plot tropes and character types I enjoy first. That said, spotting a familiar VA in the cast does instantly boost my interest a little bit.