aperture or lightroom
I have always used LR, I have never even thought of a need to use anything else, I am limited to use LR over Aperture because I run on a PC, Macs are great but I have never understood the lure of the great "Apple" machine, I am sure I would like one if someone gave one to me.
The main reasons I like LR are thus-
1-Non destructible files
2-organization, I am crappy at organization of my files, LR is turning me around
3-Lens calibration is usually spot on, especially when it comes to removing PF that the lens caused.
4-awesome control over noise adjustments
5-over all ease of use (once you learn it)
Is #3 the most notable difference between LR and Aperture 3 and how much can 3rd party plugins for Aperture even the score?
When it comes to output and features it's LR all the way. I'm actually one of the few people who didn't find Aperture intuitive and I like the database concepts of LR, but than I've IT background and those concepts can take a while to get your head around, but once you do, they are a huge time saver. There are lots of helpful videos on youtube that can ease you in.
I also like that all of my lenses have automatic correction. The automatic CA correction has been spot on all the time and the latest release of LR has pretty good PF removal. Also I like the way it handles shadows and highlights.
From PentaxForums.com: http://www.pentaxforums.com/forums/digital-processing-software-printing/210308-aperture-vs-lightroom-2013-a.html#ixzz2MfYXe8Ps