NikonNewbie

Those telephoto and w/a adapters kind of works, but they degrade the quality quite a lot. They are better suited for a bridge camera where you can't change the lens than a DSLR. If you worry about not having enough reach, the twin-lens bundle (18-55 and 55-200) with the D3200 is terrific value for money.

UV and FLD filters are, like skylight filters leftovers from the analog era. The UV does nothing as there is an UV component in the filter pack on your sensor already. FLD was necessary with film as you couldn't tweak the white balance.

Protective filters, on the other hand are a good idea if you are scared of damaging your front element.

Polarizers are necessary in some situations...

I'm also using the 105mm--new version. I know Peter prefers the old versions. I was very close to getting the Tamron 90mm but decided it was too close in focal length to my Nikkor 85mm.

The 105 is really nice, though I've been using it for portraits and food photography more than for macro shots. 

Here's the first macro shot I took with it:

One-legged grasshopper by nbanjogal, on Flickr

I haven't done much macro, but I am hoping we'll get some snow here sometime soon so I can try some snowflake shots.

Welcome aboard and congrats on getting a D3200- it will certainly open up new possibilities compared to a compact