As fans during the draft I think we sometimes get too caught up in athleticism. Don't get me wrong it is nice to have athletes on the team (and we do at 1-3), but there is something to be said for guys who are just good at basketball.
Olynyk, can shoot, pass, dribble, run the floor, finish with both hands using a variety of post moves. He has excellent understanding of spacing, and how to use his body to seal off his man. Just as important, he plays hard.
His defense, and his rebounding will improve, he improved so much every year at college and I still think he has a lot of room for growth.
Interior passing in the NBA is an art when done correctly. In reference to passing in the post I think Sullinger and Olynyk can develop into a poor man's Gasol and Z-BO (just in reference to interior passing, i'm not saying they will be near as good as Z Bo and Gasol).
This was one of the guys I wanted the Celtics to draft and I also like Kelly Olynyk.
Plus he'll make Andrew Wiggins comfortable because they are both Canadian.