It's no problem at all~
Some people don't really pay much mind to that aspect, and just pic what they like/what's popular at the time (so sick of glow-in-the-dark wolves right now ;-; )
But for me, my fursona is me, and my furry identity. So I figure I should pick something that is more like me. Not to mention, River Otters are the native species of my area, so that's even better >3>