Like most have already said, I also use Sandisk cards, both CF and SD.
I tend to buy and use smaller cards, 8 or 16gb, and take plenty with me when I go away.
Just a little history for you -
When I bought my first digital camera, a Canon G3, marketed as 'The Ultimate Photographic Tool', back in 2003 we could only get 256MB and 512MB CF cards, they just didn't make bigger ones. In fact, in the box with the camera was a Canon 32MB (yes MB !) card.
Anyway, I was so convinced that this 4MB camera was going to get through cards so quickly, that I went and bought, along with the camera a 1GB IBM Microdrive (a tiny hard drive in CF format).
The IBM Microdrive, of just 1GB, cost me £175, that's around $260 !!
Now I get 8GB SD cards for under £10 ($15) !!
I still have the Canon 32MB card and the IBM 1GB Microdrive.