Hello lordofconvix,
I only have one right now, a TK-16 Master, but I am really wanting to get a Oozora hardwood model sometime.
I am currently working on trying to land any tricks using the tama grip (holding the ball instead of the handle). I cannot wrap my head around it. It is still so satisfying nailing it on the spike though.
Most of my practice goes towards poi and clubs (toss and swing) right now, but I still try to find time to kendama several times a week. It is real nice having other props to play around with when I am not feeling my poi groove. Slackline looks real fun, I would like to try sometime. I need to lose some weight, I bet slackline is a entire body work out.
I also wanted to post some resources here for Kendama that I look at.
http://kendamaspot.com/ (USA site. A nice online shop, blog, basic trick tutorials)
http://kendamausa.com/ (USA site. Where I bought my first kendama. Cool videos from the USA pro team.)
http://www.kendamakyokai.com/index_english.html (Official Japanese Kendama Association homepage in English)