Byron, another famous Romantic poet, did not like Keats' poetry. At all. Here's what he said about it: "[…] here are Johnny Keats' piss-a-bed poetry […] There is such a trash of Keats and the like on my tables that I am ashamed to look at them… No more Keats, I entreat, flay him alive […]. There is no bearing the drivelling idiot-ism of the manikin" (source). Ouch!
Keats was a licensed apothecary (kind of like a pharmacist). He preferred writing poetry, though (source).
In "When I have fears that I may cease to be," Keats' speaker looks to the sky for love. It seems he may have done that in real life, too. In a letter to his girlfriend, Fanny Brawne, he wrote, "I will imagine you Venus tonight and pray, pray, pray to your star like a Heathen. Your's ever, fair Star" (source).