I have only two lenses, a Pentax kit wide lens (27-50mm eq) and a Sigma APO DG (70-300mm eq). Of these I like the Sigma a lot, it has a "macro" switch that lets me take shots up to 1:2 scale, and it has very good definition for its class - altogether quite a lot of bang for the buck.

My Nikon 300mm F4.0 prime! I know you like it too

Für Zoo und so das Sigma 120-300 f2.8 (man schleppt sich zwar einen ab, aber es LOHNT sich ), für die meisten anderen Gelegenheiten zur Zeit meistens das Nikkor 50/1.8

I only have three, but my favorite to mess with at the moment is a tiny Rikenon P 1:17 50mm... I love what I can do with the aperture and it's little and not clunky to haul around (still manages to weigh more than the kit lens I have for my Canon Rebel, which is twice this little lens' size)

Very arbitrary lens, I know, but my grandma sent me her ancient camera with two lenses and hey... an adapter ring does the job and now I have more than just my kit lens!

I'm just a kid hobbyist, so... my stuff is by no means special. xD But there's my two bits.

55-300mm, great for wildlife. Light to carry and easy to handle without tripod.

400 f2,8, even if I don't have it xP

For pictures in the zoo, it is the AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED (Nikon).

I'd like to have a 50mm, 1.4 Nikkor, though.