Bear in mind that using skidsteer implements adds weight out in front, so if you can use the the PT implements, those might be a better choice. Plus, most skid steer attachments are designed for machines with much larger lift capacities, so if you are thinking of a skid steer grapple, be mindful of the extra weight that will cut into your lift capacity. On a blade, that isn't really an issue. As an example, my skid steer 1500lb power broom is right at the limit of my 1445, both because of the adapter weight, and because the center of mass is 30" out from the adapter plate. (I'm about to sell the broom. I needed it for one project, and thought that I would use it for more things, but that turned out not to be the case.)
I love the PT rototiller. It works great, even in heavy soil. It has bolo tines, so it is not great at attacking truly rocky ground, where you need pick tines. I use it each spring to get the garden ready, and for making terraces for slopes in hillsides. I wouldn't try to plow with a PT; these are hydraulic drive tractors and don't have the gearing/design to plow most soils.
I spot spray. I run a Northern Tool 12V sprayer in my FEL. It works great. Someone here ran a hose to the back and used a spray bar.
I have a skid steer auger. I wanted a planetary drive auger that could be reversed, neither available from PT, plus the skid steer augers are an industry standard 2" hex drive. I'm using it with a skid steer to PT adapter at the moment, because with the skid steer mount, the anuger can be offset to auger all the way over to one side or the other. I'm not convinced that the offset auger ability is much of an advantage, but I have a complex fence project where it might, might, come in handy. If I get through that project without using it, I will weld a PT directly to the auger.
Mostly, I have the PT versions and really like them. My three non-PT are a wood
chipper (which PT doesn't make), the power broom (very cheap locally), and the auger. The PT attachments are two buckets (4n1, LMB), pallet forks (thanks to
@MossRoad), brush mower, rototiller, hitch plate, trencher, and post driver. The latter two only get used occasionally, but have paid for themselves many times over on various projects. The 1 cu.yd. Light material bucket lives on the tractor, and gets used all the time, with the pallet forks a close second for daily use, but all of them earn their keep periodically, but everyone has different needs.
All the best,
Peter