I have used virtualbox extensively and now have had to use VMware workstation 9 and 10 this last month and I much prefer virtual box. One more anecdote!

Out of curiosity what is generally your host/guest OSes? Things had gotten pretty buggy with VirtualBox running Ubuntu 13.04 inside a Windows 8 PC. (Wonder if it was just me or others too.)

2 out of 4 my boxes are Win 8 and I haven't noticed anything funny with Ubuntu 13.04. I use Linux guests fairly extensively.

I've used both for years, I consistently find VirtualBox to provide a much better experience.

Same here. I had been completely reliant on VirtualBox for ages. About a year or so ago it felt as though advancements slowed down, performance got incredibly slow, and things became buggy.

I started using VMWare Player which definitely is a lot more polished, reliable, and way faster in my opinion.