john, you cant write off huge areas like that. There are some nice bits to east leeds, crossgates, colton, whitkirk. And south leeds too has some lovely bits, Rothwell, woodlesford and garforth are all nice. West leeds (pudsey etc) are not my area of expertise, but give me seacroft over armley any day!
As said above you need to know the nice areas. Areas like beeston, gipton, halton moor, belle isle, harehills are all best avoided, but to be fair 30 seconds of driving in these areas makes it flippin obvious.