In general, I like it when starters provide variety. I would be a lot more favorable towards anthro starters if they didn't theme all 3 starters to being anthro hybrids. So something like one starter line that is anthro and two which aren't would be fine, because then there's a variety. So we each pick what we like, and then when fans come together to talk about which starter they each picked and why, this is all part of the fun.
I think something that will get across my point better is to describe what I mean by "variety in general". For example, I like how Chikorita provides a gentle and feminine option among the johto starters. It's the type of thing I wouldn't appreciate if all three were feminine choices (e.g., Chikorita, Fennekin, Popplio), but it's something that works when its part of the variety of the three starters. Conversations where Chikorita doesn't get as much love is also part of the fun of the fans coming together, and that's thanks to the variety.
Gen 4 was a case where there were two anthro starters and a choice of non-anthro quadruped Torterra. That's something I'd like to see more of. 2:1 worked very well because we hadn't really seen anthro hybrid starters yet. In an upcoming Generation 9, I would rather see a 1:2 or 0:3.