I think I'm probably going to try to learn whatever language I'm working on, and if there's anyone else who feels similarly that would be really cool. Otherwise I'm happy to work with whoever.
From Ethnologue : Code: bkl, Pop: 1200, Status: population declining, Script: Latin, Location: Indonesia. Based on a skim of the grammar sketch  it looks largely agglutinating with some fusional tendencies (jila ~ jalbili, nasona ~ nasbawena verb conjugation).
I know the people who did the Bible translation.
From Ethnologue : Code: cld, Pop: 200,000, Status: spoken but not being passed on to children, Script: Syriac  (similar to Hebrew and Arabic scripts), Location: Iraq and some neighboring regions. Wikipedia  indicates that Aramaic languages in general have triliteral root systems like other Semitic languages, so Chaldean Neo-Aramaic would presumably follow the same pattern.
I'm already learning a Semitic lang.
From Wikipedia : Codes: fi & fij, Pop: 300,000, Status: in use in public education , Script: Latin, Location: Fiji. LanguagesGulper  says it uses primarily affixation, though it does mention reduplication, so I would say agglutinating since the affixes appear to be single features (except possessives) and I have yet to see an example where any of them changes form.
Texts:  (many of them)