For me ive always had fish at home, My parents had Goldfish for as long as i remember.
I have to admit the coldwater species dont cut it for me. Interesting to watch but i would not keep them personally.
I will only keep fish i have experience with, I am very reluctant to buy any species i have never kept before. This is why im only keeping easy to care for Freshwater types
Clownlurch I had some endler Guppies that were really interesting, The fry colours were fantastic, i gave away lots on this forum back in the day, Would be interesting to know if any of the strains are around but i guess they would be the Great Great Great Grandfry or something like that by now