I like the Churchill MkVII model because its my favourite British WW2 tank. It was a little bit more difficult to build than the T34, and I made a silly mistake on it. I put the left side wheels on the wrong way round! Fortunately it's not that noticeable, except that I know its there, and it bugs me! I also like it because Tamiya provided some nice figures to make a really neat little vignette with. They included a figure of a French farmer, with his little cart, handing out bottles of wine to the tank's crew!
My T34 with its Winter camouflage scheme.
My Churchill MkVII with the French farmer!