Probs best off sticking with Gardeners World.
I jest of course (although Monty Don is hard to stop watching). Does it get better? Yes, in the sense that the character development works quite well for what it is - light entertainment in an "America, FUCK YEAH" style. If you're expecting anything much beyond that then no, you'll be disappointed. I like it, but then I'm happy to switch my brain off in front of the TV from time to time (apart from when they show someone looking through a red dot and overlaying a sniper reticule, that really gets me going).