Right, I've just finished the book and will kick this off. I'll divide my thoughts over several posts.
First of all, Lucky Jim is hilarious. The jokes range from slapstick
QUOTE
Welch, his hair flapping, was straining like a packed-down rugby forward to push the revolving door in the wrong direction... After a time Welch, somehow divining his error, began pulling instead at the now-jammed door, changing his semblance to that of anchor in a losing tug-o'-war team. With a sudden bursting click the door yielded and Welch overbalanced backwards, hitting his head on the panel behind him.
(p174. All page references to the 1992 Penguin Classic edition)
through comedic time-bombs
QUOTE
What would she be wearing this evening? He could just about bring himself to praise anything but the green Paisley frock in combination with the low-heeled, quasi-velvet shoes.
(p11)
QUOTE
She leaned sideways on her bar-stool in laughter, her hands clasped round one knee, the quasi-velvey shoe falling away from her heel... She shook her head, still laughing quietly, and pulled her cardigan up over the shoulders of the green Paisley frock.
(p19)
and long, sustained passages of pure comic genius, such as Dixon's disastrous lecture on 'Merrie England'.