Classic rock and 70s - 80s pop rock, funk is my thing, so that'd be:

• VC: V-Rock, Emotion 98.3 FM, Wave 103, Fever 105 (thus definitely the best for me)
• SA: K-DST
• IV: LRR, The Journey
• TBOGT: LRR, Vladivostok FM, Vice City FM
• V: LSRR, Vinewood Boulevard, Radio Mirror Park, Space FM (Sometimes!), Rebel Radio.

I don't use user tracks myself as I often just use Spotify, but if that'd be the case, then:

• III: MP3 Player
• VC: MP3 Player
• SA: User Track Player
• IV: Independence FM
• V: Self Radio

GTA III, Vice City: MP3 Player

GTA San Andreas: User Track Player

I only play SA, so:

K-DST

Bounce FM 

and ocassionally Radio X

The rock radio. i dont listen to much radio due to swear words.

GTA III - K-JAH

GTA Vice City - Wildstyle

GTA San Andreas -  Radio Los Santos

GTA IV - The Classics

GTA V - Channel X/West Coast Classics

i also like non stop pop

Bounce FM. Got no other favourites in any other games.

Radio X, Liberty Rock Radio, San Juan Sounds, Vladivostok FM, West Coast Classics, and my favorite station, Los Santos Rock Radio.

GTA III: Flashback FM, MSX FM, K-JAH.

GTA VC: V-Rock, Wave103, Radio Espantoso, Fever 105.

GTA SA: Playback FM, Radio X, K-DST, Master Sounds 98.3.

GTA LCS: Flashback FM, Head Radio.

GTA VCS: V-Rock, Wave103, Radio Espantoso.

GTA IV and EFLC: Vladivostok FM, Liberty Rock Radio 97.8.

GTA V: East Los FM, Los Santos Rock Radio.