Fair chunk.
7 years of Judo with the Takahashi Dojo.
12 years in a school that was nominally a Five Animals Kung Fu school, but which borrowed from FMA, Boxing, Muay Thai, JKD and Silat with the techniques and practice. Lots of unrehearsed stuff, lots of resistance training, function over form, etc. We also put on MMA gloves, mouthguards, and did heavy-to-full-contact fighting for about 8 years of that. I also studied some grappling stuff outside of Judo at this time, then put together the grappling syllabus for the club and taught it at the club for about five years. There was some weapon work in this club, but it was mostly forms, so I don't really consider that.
At about the same time, I did about 10 years of what would eventually become Siling Labuyo Arnis, so lots of stick, knife, and short-blade work, again focusing more on unrehearsed stuff and resistance training than set exercises (this part was NOT just forms at all).
School changed into something I didn't recognize, so I left.
After that, I did about 12 years of Xingyi, again focusing on resistance training, unrehearsed stuff, and hitting stuff over mindlessly practicing forms (forms were in there, but mostly to help train the structure) and a bucketload of weapon stuff, including sparring. Still doing that now. With the same teacher, simultaneously, I did old-school Yang Taiji (forms, yeah, but also unrehearsed, resistance stuff, not just endlessly repeating Da lu and 'push hands', but old school, Taiji was originally for fighting stuff) and Yang weapons (again, all kinds of stuff with that, including sparring), so about 10 years of that. Sun Style taiji, same kind of training, about 8 years.
Still doing those last things. ^_^ Mostly with a couple of my teacher's private students (we teach each other - all three of us have trained with him for more than 10 years, one of us has been with him for about 20-25years) because our Teacher has more or less retired. He's back this summer, holding classes for four of us, but that's likely his last hurrah.
I've also poked my nose into a variety of different seminars and clubs over the years. Sambo, BJJ, American Heritage Combat Arts, another Kung Fu school just to see what they were doing, that kind of thing.