Lenses I have and use:
For my large landscapes, I really like my Canon 10-22. The perspective of image is my favorite use of this lens.
I use my 24-70L for landcape detail shots and for architectural photos. Sometimes I even impress myself with the results.
I have been shooting with my 50 f/1.4, but I have not worked out all of the nuances with this lens yet. My feet need to learn the 50mm dance...

I did shoot my wife's class with the 50mm, and the 580 flash. I was pleasantly surprised with the results. Those are the only portrait/people photos I have really taken. The kids were very good for me in the still and then action shots.
I have been shooting landscapes and architectural photos with my 16-35L, but I need more practice with this lens/7D combo.
I also have the 70-300mm f/3.5. I used to like this lens on my T1i, I like it better on the 7D, but I see it's flaws more....so I shoot with it less. I want a better long lens, but that will have to wait. I am in the market for the 5DMii, which I hope to have real soon.
Lenses in the future...
TS-E 45. I am looking forward to this lens, mostly for architeture and landscape. Maybe I can even become creative with it as others have, only time will tell.
70-200L II. I am very interested in this lens to take over how I used to shoot with my 70-300. I plan on purchasing a 1.4 extender with it.