Do you have a preferred Window Manager?

Hanging out on this this forum has inspired me to re-build my lab over the past few months. I was even thinking about going for a LPI or RHCSA cert.
As part of upgrading my lab to prep for one of these certs - I was mulling over whether I should move to a different window manager. I'm not really interested in KDE or Gnome or any of the heavy weight desktop platforms. I'm seeking something for my main desktop which I would run Redhat or other Desktop VMs from.
I have been using twm for as long as I've used Unix and it's variants and I've never found anything better.
Does anyone have any other recommendations for light-weight window managers that they like?
I had used Sawmill for a short while as well. But I went back to twm. Currently, I'm looking at vtwm.
Thanks.
As part of upgrading my lab to prep for one of these certs - I was mulling over whether I should move to a different window manager. I'm not really interested in KDE or Gnome or any of the heavy weight desktop platforms. I'm seeking something for my main desktop which I would run Redhat or other Desktop VMs from.
I have been using twm for as long as I've used Unix and it's variants and I've never found anything better.
Does anyone have any other recommendations for light-weight window managers that they like?
I had used Sawmill for a short while as well. But I went back to twm. Currently, I'm looking at vtwm.
Thanks.
Comments
I have no use for desktop managers.
love it for its customizability
Openbox seems to be built for KDE and Gnome so that's probably not going to work since I don't use either.
I like i3 - at least it looks very clean - but alas I have a Nvidia card and I do not think that Xrandr is supported.
I'm going to give Fluxbox a whirl. I just downloaded the sources and compiled it. It looks simple and clean and looks like it has active support which is a plus.
Mostly in vm's or on boxes with intel graphics.
Xfce Desktop Environment
Xfce Wiki - start
About Spin: Xfce
Might also want to try lxde About Spin: LXDE
Fedora Spins
Great thing with the spins is you can test them as a live cd, then install if you like them.
I've switched from using one box with everything installed to using multiple vm's.
Pretty much a vm for each of my own projects(vm + repo).
Slowly switching to kvm and weaning myself way from vmware (except for on mac).
" Embrace, evolve, extinguish "