I am still deciding.
On my Olympus E-pl3 Micro 4/3 I have been using the Oly 50mm macro lens for small items close-ups. haven't used it much for anything else yet.
Beautiful lens.
I have two Oly kit zoom lenses that came with my E-pl1 14-42mm and 40-150mm f3.5-6. I don't really have any complaints about them. But, after lots of reading and comparing,
they are not highly regarded. So guys opt to switch the lenses out for the current version Panasonic equivalents Funny thing pictures posted at
https://www.mu-43.com/forums/native-lens-sample-image-showcase.80/ with the Oly older 14-42 and the newer RII lenses look pretty good. Then when you look at the Panasonic lenses, the pictures taken look even better. Then guys say the Pana 14-45 is better than the Pana 14-42 lenses and guys say the newer Pana "II" versions are just as good.
I would like a focal length zoom lens of 12mm-42mm, just way too expensive, not paying $600-1000 for a lens.
There was a good alternative Pana 12-32mm zoom that is affordable, kind of leaning towards one for the 12mm side. But, it doesn't have manual focus option.
Picked up a used Oly E-pl5 with the two newer R II kit lenses, when they get here, I will at least compare the older and the newer lenses and see what I think.
Can't pass up a good deal when they crop up.
I might just be happy with the 14-42mm zoom, sure like the 12mm side. Might just swing for the Pana 12-32
Guess buying lenses is like buying a search coil for a detector, you need more than one.