This ...
trouble is I'm also quite lazy with culling the bad ones and i have a PC full of photo's
Do you find though that the ones you think are going to be really bad often turn out to be your best shot ??
Every time - they look good through the screen but once on the computer they're awful and then, very occasionally, I get one on the laptop that turns out much better than expected. I have one from safari somewhere which I though was just a long-shot of a hippo yawning, then I got it home and realised that there were a family of lions in the background and a few crocs in the foreground. Not that it's a "good" photo but I've definitely had a few average shots turn out to be better than expected.
Also have to agree on culling the duff shots. I took 2,800 photos on a recent 1 week trip to Israel. Not only have I not deleted the poorer shots, I didn't even weed them out when sending to the printers so I now have them all to go through to decide what to keep and what to bin.