I know that you can almost always find out answers to most of your questions by searching for your topic in the forum, reading trip reports, etc. What I also have been finding is that many of the more experienced climbers are more than happy to offer their personal opinion on a very specific situation. That being said, here is MY very specific situation:
I have found a fairly recent forum regarding this same question (Training for Longs Peak posted in June was the most recent). When the question was posed there, Loft vs. Keyhole?, it talked about snow being a factor in the decision. I plan on attempting my climb in late August/early September so I think snow (hopefully) will not be an issue. And I'm not trying either route on my own -- I'm going to be going with someone who has experience -- I know there are several mentions of how important route finding is for the Loft route so I won't have to have that be a decision making criteria either. So if we eliminate snow and route finding, many replies say if you think you can do the Keyhole, then you can do the Loft, and you will enjoy it more. Since I think I can do the Keyhole....
I am not scared about trying Class 3. But I'm wondering about that bit of Class 4 by the Loft gully that has been mentioned. How much is a "bit"? Do you think someone who hasn't even done Class 3 before this trip can handle the Class 4? I'm planning on doing a couple weeks of increasingly difficult routes that will include Class 3 and adding elevation & distance as well before I attempt Longs (you all helped me with some of those choices, thank you, btw!) so I'm going to have some practice under by belt by the time Longs comes around. As to my physical condition -- I'm an accountant who had an EXTREMELY long, busy past few months with tax season and sat at a computer for hours and hours on end

Oh, one last question -- the TR for the Loft via East Longs Trailhead, posted by CAVUfool, says the total route is 13 miles. The TR for the Keyhole Standard Route, posted by Bill, says the total route is 14.5 miles. Is the Loft route really 1.5 miles shorter? That's a plus in my book if so

Thank you in advance for your responses!