I live in Fenton Park and I have nothing bad to say about my street! It takes me 10 minutes to run to the forest, 10 minutes to bike to the forest and 7 minutes to bike to work in the centre of town.
There are a few dodgy streets in Fenton Park but the same could be said for most areas. Lynmore, for example, has more burglaries than Fenton Park (this past week there were 3 in Lynmore, 2 in Owhata and none in Fenton Park). I would avoid the McKee St end of Jameson and McIntyre, Clouston and Lucas Pl.
Lynmore always has places to rent out, I know a few people who down Lynmore Ave and Fairley Ave - great location for forest access.
Places I would avoid are Pohutukawa Drive and the roads that go off it, Fordlands, Western Heights, Selwyn Heights, some parts of Ngongotaha (there was a meth lab bust there last week) and the Clinkard area of Glenholme.
As for the smell, well despite living a couple of blocks away from the geysers I rarely smell them. The only time I notice the smell is when I bike past Bike Vegas in town - their drain is always spewing the sulphur smell out!
I've lived here for 14 months also and have no intention of leaving. My husband and I are both keen mountainbikers (he's adopted a trail in the forest), I run and am members of both Lake City Athletic Club and the Rats tri club. As well as the beautiful forest for runs and rides there are the lakes for swimming - Blue Lake (Tikitapu) being the most popular swimming lake.
Good luck with the move,
Alison (ex pat Brit married to a Kiwi)