I'm back to my Sigma 50-150mm f/2.8 today after a long stint of having the Nikon 18-140mm f/3.5-5.6 on in its place. I love both of these lenses and it's a constant battle which one to have on: the Siggy is faster and sharper (sooo sharp) but it's also a lot bulkier.
My 18-140 is on today, I have been using all three main lenses recently. The 11-16, the 70-300 and the 18-140. I like all three and they all have very specific uses. The only lens I have not had on recently is the 40mm Macro. I guess I need to drag it out.
Usually the 17-55 2.8, however, I just got a 70-200 2.8, which is pretty much a dream come true, so I believe it'll be stuck on the camera for quite a long time now...
I started with an 18-70 and 18-200, sold them bought a 35 1.8g, and just bought a 17-55 2.8 which is fantastic. Don't think the 35 will be used much now.
Still have the Sigma 70-200mm 2.8 OS on the D7100.I have to leave it on the camera cause it's the only way I can fit all the gear in the sling shot lol.