I hope girlfirends/friends don't call you every fucking 5 minutes, especially after you hint to them to fuck off after you shoot them with an RPG. Maybe having a few girlfriends like in SA with benefits would be cool, but not calling every 5 minutes.
Clothing should have huge varieties, but not too extreme. I sure didn't feel like an OG walking down grove street in a bright yellow suit. The clothing should fit the charater. But CJ was a pimp so... But basically I think there should be: a street shop where all the G's steal buy their clothes; an expensive shop; an average shop and a casual shop.
On the internet there should be quite a few easteregg sites and such, I really enjoyed those in IV. It was hilarious going on that child porn site and getting 4 stars.