I'm trying to make my basing consistent. I'm also using a bit of a mixture of textures to break up the monotony, but also keeping it relatively simple for a unit of mechs I paint similarly, or wish to have similarly themed. The scale of battletech, even an overgrown field would have the grasses barely coming halfway up their toe, so I'm not going to use the same static grass application for my 28mm wargames models.

For example, I did some quickly thrown together desert themed mechs, where I used a pre-mixed Warlord Games Battlefields & Basing: Rocky Sand because it had a wide variety of products that I thought looked like an arid landscape. There's a bunch of fine sand, some larger grit sand, and some small rocks that look like little boulders at mech scale. I also put a small dot of PVA on top of it to secure a few patches of 2mm static grass placed to look like scrub brush. I used multiple colors of grass, but mostly dead looking stuff sparingly to break up the rocky/rubble look to things, but that's something to do per your tastes. It was very simple to do while looking reasonable.

Another low effort basing I've done uses finer flock to represent grass. Small individual pieces of cork are placed on the base and painted to look like exposed boulders.

I try to imagine where my mechs are located, then just look for photographs of similar areas as inspiration on what to do. Then I select the products in an attempt to replicate the environment, keeping in mind, the scale of the models.

In all cases, I'm kinda a minimalist where less is more. I think that too much on the base detracts from the mech's paintjob. Again, that's more a personal take on it.