So far my favorite has been my EoTG (still working on howdah), but I think the Slann may be more fun then it.
I already have like 8 hours into my EoTG (painting every detail) and I expect my Slann will be a 10 hour model as well. I do models like that over more then one day, and they come out very well. I wish I could show you, but I don't have a camera, nor a photobucket account or anything, and I wouldn't know how to do it, Lol.
But if it helps put it in perspective, when I do a model it takes me maybe...2 hours for a character, and I do my blocks in an assembly line. But when I do 10+ hours on one model, I can just about match the GW cover pictures in quality.
A guy that goes to my gaming club worked for GW for 10 years, and he was really surprised when I told him I started painting just 2-3 months ago. Of course his models are GW quality but he does entire blocks of troops in 2 hours all at that level. Damn people and their talents I don't have... >__<