This is probably my most used compressor. Basically, when I'm thinking of general compression, I first reach to Big Blue Compressor. I use it for drums, synths, piano, mix buss, almost everything. It is very feature packed (check the details page). It has excellent drive control, which allows you to add that "mojo" to your sound, the saturation sounds pleasing on almost everything. Another nice feature is choke. It doesn't work well with everything, but on certain sounds it can "choke" (distort) transients in a cool way. Depending on your needs this compressor allows you to dial clean or dirty compression. It has both high- and low-pass filters for sidechain, which, when used on a full mix, allow you to focus compressor response on kick, giving you some nice kick-pumping. You can greatly widen stereo image by using it in parallel to compress side signal with stereo control set to wide.
Because I tend to mix loud (my kicks usually peak at around -3db) for me Big Blue Compressor provides nice glue compression with it's default settings.
Big Blue compressor comes bundled with couple of skins, but I stick to default one (suits me well). Also I like that it has XL skins, which works pretty well on my hi-res Samsung tablet.