A kershaw kuro (cheap spring assisted partially serrated) I've been carrying it for about a year and a half now and it has not had an easy life. Been used for cutting weed eater line, plastic bands, opening countless cardboard boxes, as a screw driver and to pull weeds with. When it needs replaced I would have no problem getting another just like it. One of the best knives for the money in my opinion.
Either a Ruger LC9s or Ruger SR40C depending how I want to carry. I always carry a spare mag. SpiderCo Tenacious G-10 knife is what I've been carrying mostly.