I'd love to hear which subways you support.
Spadina line to Steeles West. Yonge line to Richmond Hill. DRL from Eglinton through Pape/Donlands to Queen/Wellington then west at least to Spadina ... and probably up to Dundas West.
I've also spoken in favour of both extending Sheppard to Victoria Park (though I balk if it really costs $1-billion) and extending Danforth to Scarborough Town Centre - but I think the ship has sailed on both of these, so no point debating any more, until we see significant ridership increases in 30-40 years or so.
I'm quite happy to see Danforth extended one station to Brimely/Danforth/Eglinton - and perhaps even to Scarborough GO and Eglinton/Kingston, depending on ridership projections (it could always have a branch that goes one way to STC and another way to Kingston Road. And I'm not opposed at extending the Bloor line to East Mall. I've mused if one day extending either to Pearson or Mississauga City Centre might be in the cards (or perhaps a branch).
I'm luke warm on the proposal to branch the Spadina line at Downsview along Sheppard West to connect to the Sheppard Line. I could be convinced, as it provides great network connection for only 3.5 km of subway (remember the Sheppard line already extends west to the edge of the Senlac station box).
For stuff after that, I've advocated for breaking the Yonge-University line at Union and extending the Yonge line at least to Spadina (and perhaps up Spadina, or perhaps further west) and the University line to at least West Donlands (maybe to Portlands one day, and onto Woodbine/Queen and up to the Danforth line somewhere).
I bet all these lines (other than perhaps Sheppard West, which is more about network connectivity) would have more riders that extending Sheppard East, east of Victoria Park.
I've never been anti-subway. Just anti-subways that will be grossly underused. I'm pro-transit. Subway where necessary, but not necessarily subways. We need a big increase in transit infrastructure, a mixture of new subways, new LRT, and new heavy rail (both local service and express rail).