A list of good/bad MFT lens for new owner?

It depends on what you shoot!

For wide angle stuff, then 14mm f2.5 wins hands down. It's also extremely compact (length wise)... comparable lenses are:

- 12 f2: better (and more wide), but pricey
  - 12-35 X f2.8: you trade off some aperture + IQ for the ability to zoom (and pricey)

For a more normal lens, then the 17 f1.8 is currently the king. It's a very good lens that is reasonably compact... comparable lenses are:

- 17 f2.8: the older 17 lens, IQ is decent, but AF is a tad slow. Though works out cheaper!
  - 20 f1.7: IQ is very good (head to head with 17 f1.8?), but AF is a tad slow.
  - 19 f2.8: IQ is OK and for a slower f2.8 the lens is a lot bigger. But costs only £99!

Also, for the slower f2.8 lenses the 12-35 X also becomes a viable competitor!

25 f1.4 is an excellent lens, but it would be considered a different range (more std than wide), and quite pricey.

30 f2.8 is good for the price (£99)... but its a lot slower.

45 f1.8 is a telephoto, so doens't really compare in the range.