1. Prison Break: This game would be amazing if you could escape prison with a plan. I know there has been questions about this. What if your friends/gang/organization could hijack the prison bus on your way to prison. 2. Gambling: Casinos would be amazing. I've heard casinos haven't been planned yet, but what about betting? Like Horse Racing!!! 3. Sports & Hobbies: Golf, tennis, swimming etc. with money prices. 4. Racing: Illegal street racing with money betting and legal racing with money prices. 5. Fuel: Have fuel stations as a business. 6. Robbing: Robable small stores so solo players also can do robberies... 7. Bar and clubs: A place for people to meet new friends and ... 8. Network for crime: Hire a assasin to kill your enemy. Order drugs/guns etc. to your door. 9. Farming: Have a farm with potatoes, apple trees etc. that you can sell to food companies.. 10. Boat life: Live in boats and design interior like a house. Stay out of police radar if you are wanted! 11. AI & NPC: NPC players roaming the streets, AI traffic etc. 12. BANKS: Playerowned banks, where you can loan money and give people insurance.

Thanks for the answers. I'll do some more research on the game.