You should. I love just enjoying the city and playing in the sandbox. I also love story playing the storylines in games but GTAIV is so loaded, the sandbox play already offers alot of stuff to do.
I will play the story when I get a chance to. Which involves buying a new 360. I just enjoy what I can of the game when over at my friends place. I did play one of the last missions for him though, on the large boat, because he couldn't do it. Alot of fun.
For people who have done these achievements, we've both spent hours hanging out trying to do these 2 and just can't get 'em: 5 minutes with 6 stars (getting that 6th star is a bit difficult on it's own, the other 5 are a breeze though) and roll a car 5 times. Any advice for ways it might be easier to get them done? :dunno: