We'll I just e-filed my first form 1 last week after years of dealing with paper forms. If the times were the same, I'd paper file...I'm still a little perturbed I'm not getting my physical stamp. That may seem ludicrous to some, but I believe in actually getting something of value in return for my $200. The government had to make and issue that stamp in a $200 denomination, then declare it used. At least I know that I got the physical stamp, and to some, they're actually worth something if you sell it later down the line. With e-file, you don't get anything except the approval. The stamp is a picture, not anything physical.
All that may seem ludicrous and pale in comparison to the fact that you're getting an approval, but to some it is somewhat important. As for me, the times aren't equal and I'm not willing to wait another 3-4 months in addition to the month I'll already be waiting in order to get my physical stamp.
I just wish they would follow up with a physical copy of the form after they send you the electronic copy. Then it would be the best of both worlds.