What happened to the positive black TV families?

My favourite American black sitcoms have have all stopped showing. Well the Cosby Show and Diff'rent Strokes (which I've started watching recently) stopped years ago...but i have to say i do miss sitcoms like those which show the black family in a positive light. I was sad when i was watching the last episode of The Fresh Prince of Belaire, this show was my weekly dose of jokes. The Cosby show takes me back to my childhood days, when i watch the classic re-runs now it's like I'm taking a dive back into the 80's. The most recent black sitcom to end is the Hilarius My Wife and Kids, when i my friend had told me that the producers had stopped filming the show i thought 'arrgh what am i going to watch now!'. Not to say these are the only type of TV i watch but they're the only ones i can really relate to.

The one thing these sitcoms have in common is, they're all American! I'm trying to think now...i don't recall any black British sitcoms...oh wait 'Desmond's' was one, that was great, Desmond was the owner of a barbershop and most of the comedy happened right there, it was soo funny. Oh and i remember that he was of Guyanese heritage! This showed around the early 90's and stopped filming after Desmond's death.

I'm trying to think of any other show..there was 'Baby father' which aired around 2002 and ended shortly after. Oh and then there was the seriously unfunny sitcom which i can't even remember the name of! and not to forget the popular comedy sketch show 'The Real McCoy' which was like the black communities answer to 'Goodness Gracious Me'.

Anyhow, although a few black comedies have aired on TV, there hasn't been any quality black sitcoms like the good old Cosby Show. I miss watching the warm, loving and successful black Dr Huxtable teach and educate his happy children beside his equally successful wife. Things like this aren't on TV anymore, and i just don't understand why. The only black family i see on TV are on Eastenders and it's not very positive. Black families are hardly ever shown on TV nowadays and when they are shown, they seem to be struggling, working menial jobs, unglamorous and disappointing. Why can't they convey BOTH the successes and struggles together, like any other race, black people are not always poor. Why can't the son's be successful and daughters be ambitious, instead of being portrayed as 'no good' and a threat.

My question is why can't black families be shown more positively on television here, in the same way that black families in America are portrayed?