I expect a dozen different posts with a dozen different answers. This is more out of curiosity of what people think is too much. For the most part, reptiles require less space and are lower maintenance compared to other animals such as dogs, cats, ferrets, etc. The exception to that are monitors and tegus. At what point do you make the call that you have too many reptiles or you can't have more? Space? Time? Finances?
For me, it's space, time and finances. I work full time, I'm back in school full time and I'm breeding hognoses next year. I'll have my hands full with all the hatchlings in addition to all the other reptiles I have. There are several different species I'm interested in but don't want to jump in and dislike keeping them. I have ball pythons, corns, sand boas and soon a burm. I love the 2 corns I have but have no interest in having more as they aren't my thing. I love seeing the large monitors but don't have the space for them and have no real experience so it wouldn't be fair to buy one only to realize they aren't for me. I do find myself wondering if I have too many hognoses as I look at expanding with 2 more for the axanthic projects. Depression and stress also contribute to that doubt so there's that.
What about you? What's your limit?