I've found too, that different tasks require different pads.I'll probably give it a shot, those jobman service pants seem like a good way to test the waters. See if I like the kneepad pockets, as well as the pocket layout. If not, I'll probably end up getting some of those volleyball style knee pads for my carhartts or riggs if I end up liking those.
For day to day stuff, where I'm just up and down a lot, I use the cheap light pads from Lowes, and we trash them regularly, I wear them when we place concrete too so they get the **** kicked out of them, they are disposable.
An hour or two without getting up, I'll grab the Toughbuilt floor layers pads, they are good for short stints on the ground and have lots of stability.
If I'm going to be on the ground all day long, I'll use the Fento pads (sold as Traxx in the US). They are much larger, and not really great for walking around in, but so much more comfortable for long hauls while kneeling.
Far and away I end up with very light pads on while doing daily tasks, that way I can be up and down quickly without worrying about my knees, and I can easily shed them for tasks that don't require them, like placing wall forms or something.
I just felt incredibly "heavy" with pads always attached to me, and it wasn't worth it for a sub par pad for most tasks when I can strap on something much better that leaves me felling better at the end of the day.