Got a bit tired of having to go through each voice in the settings to preview what they say, so I made a list of what each voice may contain/sounds like as a reference, and decided to share it here. You can preview all included voicelines wherever Rimworld is installed, then go back into

I tried to find the source for most of these voicelines but can only find a few :(

You might be able to switch out the different .ogg files for a custom voice pack but it may be reverted if the mod is updated. You may also be able to remove the "radio chatter" effect by deleting/renaming the off and on .wav files from the root directory of UnitResponse.

Without further ado:

Female1 -- Standard female
Female2 -- Seductive French
Female3 -- Smartass british
Female4 -- Scottish
Female5 -- British
Female6 -- Another British
Female7 -- Cocky/Tomboyish
Female8 -- Straightforward; death sound good for psycaster
Female9 -- Young
Female10 -- Robotic
Female11 -- Badass-sounding
Female12 -- Eloquent British, royal sounding
Female13 -- Playful/nervous
Female14 -- Evil alien
Female15 -- Impatient/cocky
Female16 -- Eloquent alien
Female17 -- Angry tribal/alien
Female18 -- Another angry tribal/alien
Female19 -- Sad psycaster
Female20 -- Echoey/ethereal psycaster
Female21 -- Seductive
Female22 -- Royal/posh
Female23 -- Devilish, good for impish/flame psycaster
Female24 -- Whispery/stealthy/psycaster

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Male1 -- Combine Soldier
Male2 -- Cocky/augmented
Male3 -- Evil
Male4 -- Another evil
Male5 -- Bold sounding soldier, good for sniper
Male6 -- Orcish sounding
Male7 -- Transhuman overlord
Male8 -- Lawful good/Justice centered
Male9 -- Simple/detached
Male10 -- Bob Ross
Male11 -- Tommy Wiseau
Male12 -- Russian soldier (COD?)
Male13 -- HK-47 (Sarcastic robot)
Male14 -- Space Marine / Ishmael Hyperius
Male15 -- Robotic/voice processed soldier
Male16 -- JC Denton
Male17 -- Adam Jensen
Male18 -- StarCraft Arbiter
Male19 -- Deep processed evil voice (probably from Starcraft idk)
Male20 -- StarCraft Dark Archon
Male21 -- StarCraft Dragoon (Security robot)
Male22 -- Starcraft Goliath
Male23 -- Dark-sounding doom centered
Male24 -- Evil transhumanist
Male25 -- Evil vampire/blooddrinker
Male26 -- Comically evil
Male27 -- Death-centered evil
Male28 -- Devilish/evil, good for impish/flame psycaster