It depends on what sort of place you like. I like Colne and Padiham, as they're a bit 'on the edges' but still have shops and GPs, Colne more so as it's larger, but in both, choose your street carefully, as you would do anywhere. Being smaller places than the likes of Burnley or Nelson, even if you're in the centre of Colne or Padiham it's a short walk to open countryside. Neither are posh or fashionable, but that's why they're cheaper. Outlying parts of Burnley/Nelson can be very nice, some are really villages in their own right, but you need to look carefully. I'd tend to avoid the centres of both towns.
The villages round Pendle (Fence, Higham, Sabden, etc.) can be expensive and some have no shop. North of Pendle, Clitheroe is bigger and posher, but is also expensive, and not all of it is as nice as people assume. West of Pendle, Whalley is small and nice but still has has shops and schools and is handier for the fleshpots of Blackburn- but be careful about flooding.
Barnoldswick and Earby to the east of Pendle depend a lot on a couple of local employers (Rolls Royce at 'Barlick', as it's called) always risky, but again, surrounded by nice countryside.
Trawden is a curious village. Close to Colne, but has its own character- and a community shop and pub. Some gorgeous old houses, some interesting old terraces, but nothing much that's modern, if you're after a 60s 3-bed with a garden, as it's on steep slopes (Colne is too). Also has a school and a GP surgery.