Indeed. It was kind of pointless to report this.
The guide doesn't really get into the little details about the gangs (I might be talking too much about how my guides were) but you made a great overview. Good guide.
Vice City Stories and GTA III I would imagine are the easiest to get to 100% (The only GTA game I got to 100% was VCS).
Vice City wouldn't be too tough but the RC missions are a bitch.
Liberty City Stories would be the second or third easiest whether or not you can do the Scrapyard Challenge and the Bumps & Grinds missions.
San Andreas... good luck with that.