When you watch the NBA draft: you know most of the names from following the college tournament. Unless, they are from a foreign country then you just pretend that you know whether you like or dislike the pick. (My advice is to always dislike it. Europeans are soft.) Towards the end of the first round you usually end up watching something else because the last few picks never end up mattering much. In the end you are excited to see how a guy turns out next year.
When you watch the NFL draft: you know most of the names because all ESPN does is talk about football 24 hours a day/7 days a week/365 days a year. I think the day after the Super Bowl last year they had a prediction show. You sit and watch the entire draft for 10-15 hours wondering where your life has gone. In the end you are excited to see how a guy turns out next year.
When you watch the NHL draft: lol nobody watches the NHL draft.
When you watch the MLB draft: you have pretty much no idea who anybody is and the announcers who are saying great pick or bad pick pretty much don't know either. You watch the first round until your team has picked or just leave it on in the background as you go online. In the end you are excited to see how a guy turns out in the next 2-5 years.