Besides Macross stuff, I used to collect a lot of Gundam kits, MSiA, MSiP, SoC, GFF and a few other bits and bobs.
These days however due to a lack of both space and finances and a general disinterest in anything Gundam, I limit myself almost purely to Macross toys and have sold off most of my non-Macross toy collection on ebay over the past year.
Scale and size doesn't really bother me, but I do prefer toys with an accurate, realistic sculpt and a high level of detail and articulation. I don't like toys with exagerated sculpts such as the Toynami VF-1 Super Poseables.
I'm also not particularly bothered about die-cast metal content (or lack of it). In fact for transforming toys, I prefer little to no die-cast, except where necessary for strength. I generally prefer my toys made of ABS and have gone right off PVC figures such as the MSiA and GFF line.
I still buy at least one each of most Macross toys produced, except for some of the smaller items, such as the pencil sharpeners and the recent Tomy diorama sets, which I avoided as I thought they had naff sculpts and poor paint jobs.
For me to buy a non-Macross toy these days, it has to be a really outstanding toy of a design I like, from an anime I like. Generally as a rule, I prefer realistic style military mecha to Super Robots.
I tend to stick to Japanese toys, I have little interest in US toys as my interest in most US franchises like Star Wars died years ago. I can't recall exactly the last time I bought a US toy, probably 5-10 years ago (the Action Fleet Aliens Drop Ship).
the only non-Macross toys I am considering buying this year are the Yamato 1/12 Votoms, once they release a Red Shoulder Custom version with full weapons and at least one Toynami MPC Alpha (if they every get released). I may buy more Alphas if they have no problems.
I nearly bought the recently released Max Factory Guyver III figure as I used to be a big Guyver fan, but after allowing my self a cooling-off period, I figured I didn't really need it.
Graham