I'm playing this too, and I'm 11 hours in or so, maybe more after yesterday (I might have started at 11 and put in 2-3). I think give it a bit more. I find that depending on the point I am at, it either has me really hooked, or I'm pretty "meh." Can you describe a bit what point you're at?
The load times are long, but really, there aren't that many. Areas are pretty large to explore after a load. The graphics are dated compared to 360 or PS3 I suppose, but it doesn't bother me, since I don't have either one of those systems.
My two suggestions are: Play through and get well into chapter 2, if you haven't yet. It's quite a bit more interesting IMHO. -OR- Look around online, and get a copy of JE: Special Ed. for PC. It's pretty recently released, but still, not expensive. It has better graphics, and probably better load times. I'm not sure about load times, I'm just assuming...check that out perhaps. That's a good option for you judging from the system specs in you sig though. Amazon has it for ~$15 new and "used & new for $5."