What Mac Mail solution do you use?

Judith, as TUAW-reading faithfuls know, likes to ask me to ask you all questions whenever she is considering what the best option is for her own personal Mac usage. Here's one such question: What Mac Mail solution do you use and why?

I, personally, use Mail.app to handle all of my 6 or so email addresses, and I have an obscene level of folders, and now thanks to Tiger, smart folders set up to file everything I receive automatically. I do not, however, use Mail.app's built-in spam-filtering options, because they didn't work back in Panther when I first started using Mail.app on a regular basis, and I've become accustomed to using Spam Sieve (which happens to work very nicely).

Any staunch Entourage users out there? Gmail hackers? Please, share your email war-stories with us in the comments below.