I mainly collect series 1, 2, 3 and the unpainted models from series 4; but also I'm trying to collect my favourite model, series 1's Werewolf, in as many different forms as possible.
Starting with the basics:
Series 1 normal colours- COMPLETE
Series 1 light purple- COMPLETE
Series 1 neon green- COMPLETE
Series 1 neon yellow- COMPLETE
Series 1 neon red- Just one needed! NR Goblin. Will pay or trade generously for one!
Series 1 premiums- plenty still needed, but I'm pretty happy with these
Series 2- COMPLETE
Series 3- COMPLETE enough for me- 1 of each sculpt
Series 4- unpainted
To be continued- up next, the werewolf collection!