Well, SR2 was incredibly fun even though it was a console port. That being said, there just isn't enough free time to play SR3 D:
Yes it is! Go buy it! Or torrent it atleast! Preferably buy it! There's no reason not too!
By the way, found it so funny at launch. Some of the nerds and specifically PC ONLY ELITIST nerds tried and tried to find something to have a reason to flame/not buy SR3 and most of them raged because Saints Row 3 released DLC the same day it came out.
The DLC? Buy Cheats for like 1.5 euro and extra costume/gun for same price and some other small shit.
You don't really have to buy the cheats if you want to use them lol. Just google Saints Row 3 cheats and boom there ya go. But those nerds still raged, as usual. Always trying to look after flaws that doesn't exist and etc etc..
However if you liked SR1+SR2 keep in mind. It's much more unrealistic than SR1+2 and the story is 100x more goofy and crazy than those ones and sometimes it leaves you like...eh o.o WTF.
But still it's fun as hell.