I have plenty of pokemon I really like, and it has been really hard for me to chose a "top ten" or something similar. I saw this tool which can help out deciding and it did. Some were a little surprise and some of them are more fluid on their placements, since I at some point had to chose between a pair which I really couldn't chose inbetween.
It takes time, and gets more difficult for every turn. I ended up stopping at 14, because the last few had pulled teeth in making a choice. No surprises for me really. What's the most surprising is that I haven't even played with half of them...
I should probably not have stopped so early... but I'd be here all day if I actually did more than 15. Here we go. If any system ever asks me to choose between that top two again, I swear I will find the source code and deliberately break it. Entirely.
I'd say this is pretty accurate, though I couldn't really pick between a bunch of those so the order's a little weird to me.