Haven't been up Maxstoke for a while! I think I sit about 1000th on that one (must pay it a visit again sometime!). Yes I know a few people who can fire up hills at a ridiculous speed but they live on lettuce leaves rather than real food and personally like having a beer and a pie!By the time I've cycled twenty miles, I don't really fancy anything more challenging than a nice cuppa personally. The toughest one I've found within a sensible distance (by my low standards) is Green End Rd, out by Maxstoke.
On Strava, it's here.
Strava Segment | Maxstoke Hill
There are probably blokes hereabouts that can go up this one faster than I can go down it! Currently, I'm just running a bit - the bike can come out in summer.