Honestly, I started out the same way. I thought Z-Wave was the thing. I was trying to stick within Z-Wave. But then I became a tester and got some Zigbee stuff. I also fell in love with Lutron's Caseta ClearConnect line.
I don't think Z-Wave is very good. It's been less reliable than Zigbee or ClearConnect for me. Also, interesting to note, Google's recent OnHub includes Zigbee, but no Z-Wave.
In the end, I think it's just far too early... well not early. I don't know what it is, but I don't think it's a good idea to pick a side if you are going to do Home Automation right now. There are too many decent hubs that can do everything that it's just silly to limit yourself.
And if you want my semi-professional tech opinion... with all these hubs becoming the focus, I'd be very surprised to see any one standard win out completely. This isn't turning out like Bluray vs HDDVD... there's Zigbee, Z-Wave, ClearConnect, Weave, Thread, Bluetooth, Wifi, MyQ. And the focus in Home Automation has been getting them to work together, not exclusivity. That points me to a future where the wireless protocol doesn't matter as long as it works.
To note, that's Wink's plan. Smartthings seems to be following suit with prettier V2 hub that seems less "techy". That's definitely the language Google is using for OnHub in regards to being a router and I'm sure they'll use that same language for Home Automation stuff. Look at Nest's popularity. Stupid simplicity. Average consumers don't get a crap about which is better, Zigbee or Z-Wave. They just want it to work.