There's just nothing special about the opening at all. An opening should get you in the mood of the anime through both the words, the emotions through the song, as well as the scenes selected. Nothing that they did for the Bebop Opening did this, or at least cared to even spend time trying to make someone interested in watching the episode.
Consider the three best anime openings
Accel World - Burst Through Gravity
Guilty Crown - Everlasting Guilty Crown
Naruto Shippuden - Hero's Come Back
And compare any of them to
Cowboy Bebop's - Tank and its very clear how it pales in comparison to even one of the weaker of the best OP's (
Tsubasa Reservoir Chronicle - Blaze). Like what is the OP even doing there for Bebop, its misleading making one think Spike is some epic character with epic gun skills, that there are tons of good space fights and what not and etc. What we got was far from that. And they could have honestly chose a better song.