I went to check the #discover tab on a lark. Absolutely nothing interested me. I have 4700+ tweets to my username, you'd think that would be enough info to show me one story about gaming perhaps (considering 99% of my tweets are about gaming).
The following people are recommended as interesting to me: Snoop Dogg (haven't listened to his records in years), Martha Stewart (have no real idea why I'd want that), Serena Williams (her off of the tennis?), Juanes (who?), the San Francisco Zoo (I'm in the UK...), Rachel Zoe (who?), Dana White (who?), etc...
There's a strong possibility that I'm hopelessly out of the loop. Either way, my opinion of the Twitter service remains unchanged.