I'm still fairly new to the game so I've tried a bit of everything. Exploring was one of the biggies that I've been wanting to try but I didn't have the patience to save for an Asp (plus kit) or something, so I'm shooting around the galaxy in an Adder with top spec gear. Now, I'm enjoying it immensely (plus I know I'll be getting bundles of cash when I get back), but I don't think I'm an explorer at heart. I'm taking an off the beaten path track to Sgr. A (I shot diagonally up from a minor system for about 400Ly, now I'm heading in Sgr. A's general direction). It took about 500Ly from Sol before I got to a point when nothing has been discovered. Lots of T Tauri and Red Dwarf with metal rich planet and gas giants with atmospheric life around here.
But yeah, I'm not an explorer at heart...I shall go to Sgr. A and potter about until PP comes out, then I shall shoot straight back to populated space, cash in, buy and kit out whatever I can afford and start getting involved in the CG's and PP stuff.
One thing, if I didn't quite realise how big the galaxy was before exploring, I certainly do now. You plot out this 1000Ly journey for the evening, zoom out to full galaxy view and it's barely a dent...awesome.