I found Tim a bit dull at first, but I think it's his understated presence that has actually won me over - He's a drifter in the tradition of Jack Duckworth, but unlike Jack, God rest him, he's basically honest and more of a gentle soul unburdened by ambition than a layabout.
Those scenes of the immature wallybrains in the factory joking about Tim and Kevin being gay were excruciating though. Where is Carla telling them to belt up and get back to work when you actually need her?