I use to hardly ever use a tripod, but I didn't really shoot a whole bunch of landscapes. I have made it a point to shoot more of those this year and use a tripod for every one. I like to shoot both my 7D and 6D on separate tripods. Usually the 7D does the long exposure and the 6D does the HDR stuff. Once I get my birthday lens, that is probably going to switch. I have two cheaper tripods, one being a silk pro700??? and the other is a dolce cheap bullhead I recently purchased off amazon. I am thinking of investing is a ball head for the Silk since it is a pano head because the ball head is so much easier to use. The Dolce is super light. I tend to use it with the legs completely spread so it is very low to the ground. Don't really trust it with my gear at normal height. The Silk is a beast and is probably 10lbs. It gets anything longer than 70mm.
I have a pretty steady hand so macro and wildlife is all hand held. Landscapes are 100% tripod. Hope that helps.