I would have loved to get another Sopwith Tripe - was a lovely kit to build, Albatros DVa (sooooo many decal options) and the LVG. The latter mainly due to the fact that the early release WNW lozenge, was, in retrospect and in my own opinion, not as good as what is available now!
I too cannot afford to buy every kit - in fact there are several I have little interest in as I don't find them aesthetically pleasing to my taste. Mind you, I wasn't that excited about the Fe2b, but got one as a gift and loved it!
I did save up and splash out on the Felixstowe very recently. God only knows when it will get built but I certainly didn't want to miss out.
I have a couple in my stash I may consider as investments, for example I have 2 of the RNAS Pup kits - I was lucky to snap up the final kit that Hannants had in the UK just after they went off-sale on the WNW site... I have another Albie but without checking am not sure if this is the DV or DVa..