i think that the must see modern bollywoood films for pure escapism are
DDLJ
KKHH
KANK
KKKG
KHNH
Hum tum
Veer zaara
Dil Chahta hai (no one seems to mention this amazing, beautiful film)
Fanaa
Mohabattein (not sure about that but watch it for one time only)
Black is not a escapism film but is so so so brilliant!!!!! for the performances