Every model that I've completed and looked back on with disdain comes back to one thing - I rushed.
Don't be too hard on yourself. Build a kit, have fun doing it, learn and build another kit. This is supposed to be fun!
Has anyone heard of a Me-323 kit in 1/48 scale? Such a beast is eluded to in this article:
1/48 Revell Ju-52 by Tayfun Gerdan
Yes, I know the finished kit will be gigantic - I'm a glutton for punishment.
Scale really depends on what you're wanting to build.
1/48 scale offers a pretty good range of projects. Lots of aircraft and a fair smattering of armor and vehicles. That being said, larger aircraft offerings tend to be a little bit more sparse (though it's getting better as the scale...