I play Sims 3. Love it. I currently have four expansion packs. Pets, World Adventures, Supernatural, and Showtime. I'm getting Ambitions soon though. ^^
Darn someone posted about cheats already XD. A really nice one though is when you making a new household (we all know how to open the cheat bar right?) type in 'freerealestate' then after that, buy a cheap house (accept but don't start playing yet) then after that all of the lots (even the really expensive ones should be available to you to buy. Go ahead and buy the one and go ahead and start playing. You now own this epic mansion or whatever it is you bought.
. Another I often use is after using 'testingcheatsenabled true' you shift click on the mailbox then you push 'all happy' and then shift click on the mailbox again and click 'make needs static' it's really nice because then your sims never get hungry, or have to go to the bathroom, they can work out without getting fatigued, they never get smelly, and they are always happy. This way you can focus completely on skills, though if your sim is employed
you do still have to go to work You can also ctrl+click on moodlets to delete them, and ctrl+click and drag the bars under other sims to make them your best friends right away.