I have nothing better to do today, so I will tell you my story as well
My beginnings in Fvwm was not so good. I really hated that 95-ish look of some kind of strange window manager that someone gave me to make a bit more functional my X-session on the shell account of my university. That was around 1996/1997 or so. I never liked the Windows 95 interface, but, well, TWM was not so functional (amongst many other problems). That was on Solaris based machines.
In that time I was used to KDE (which performance was degrading on huge steps) and Window Maker (that I liked the most, because it was light and I really felt comfortable with it’s applets.
I started using it and never felt interested about diggin on its internals, I did not even know that that 95-like thing was based on FVWM (I saw before the classic pink fvwm and, well, I did not realise that both were really the same window manager with just different configs and a few patches).
Years passed ant I passed thru Gnome (that never liked either, and whose file dialogs I hate like the hell), E, WIndowMaker again, and finally Fluxbox. Flux was fine but I was missing something more configurable (Flux is too simple). Then I started to use kde-3.0 and I have to say that I was so impressed, overall when 3.2 (or .3, dont really remember) came to the light. The performance boost in comparisson with the 2.x series was really huge, and the management of resources was a lot better (at least the memory consumption was clearly smaller, with a sane config, of course).
But I was still missing something… For example something like a simple and clean config. To really get a clean interface with kde I was forced to use the most unclean solution, the baghira kwin theme (wich is one of the heaviest thing, being the crystal decoration the only heavier thing that I know of). I used it with the gradient option and both colors set to the same (so it was just a plaing deco, as it should). About the qt style the thing was easier, I just used reinhardt, that I loved and still love, though now I use qtcurve, since I can use the same for the gtk applications).
So, I was one day wondering around the Gentoo Forums and I got to see the huge thread relating fvwm and saw some screenshots and some interesting stuff that really impressed me. I had no idea at all that the pinkie wm that I disliked so much in the past was able to do that things. The transparencies really did not impress me too much (I dont like them and find them annoying for the daily work) but some other things like the power of the dinamic menus, the vector decos and the configurability of the focus, the placement, and the pager really impressed me. Every single bit was configurable, and with the plus of an easy mechanism to add features thru external applications (I’m talking about piperead here). At a first glance millions of things came to my head, that was definitively impossible with a conventional DE or WM. So I started using it and, until today, I can say that my performance has drastically boosted.
Every single piece of the 6thpink’s desktop behaves just like 6thpink wants it to behave. Incredible, but true. I can’t say that it deceived me, I’m now a happy fvwm user for ever (unless fvwm 3.0 takes 150 mb or ram ). And all thanks to these forums and the Gentoo ones. All your help and the mailing lists also helped a lot.