I'm really happy that Eva seems to get more depth and characterization later!

I buy, borrow and dl manga, along with standing in the bookstore and reading it. It's a mix of practicality, what's available in the library, what's available translated, my budget, and pure whim. Usually I don't buy a series unless I know I like it (or if it's been highly recced, or if it's on sale, or... on a whim).