First pic:
- seems like a consistent deviation in axis (Y or X). Check the axis movement for small bumps.

Second and third pic:
- I saw similar problems when printing PLA with clone E3Dv6 hotend; small areas with too long retractions caused partial jamming of the filament and the results were quite similar. Try lowering retraction length or even disabling retractions completely, at least for testing. PLA is particularly troublesome because of the low melting temp and can cause problems with filament sticking in the hotend.

Fourth pic:
- Z wobble? Might be related to the first pic...