>>43800611it's definitely that risk factor for me, there's a chance that your desired target will appear and there's a chance it's not, it's that element of surprise for me. factor in movesets and if the wild pokemon has a self-harming move or something as dangerous, and it becomes a nice blend of both being excited but also needing to strategize (mainly for legendaries).
there's also marks in gen 8 like
>>43800672 said, while i don't give a shit about them (i feel that they're just there to make the mon feel "unique"), it's a nice surprise to see a shiny also have a rare mark.