The Cloud and App Space are hot for me.
I realize verticals such as insurance, credit, mortgage, etc are the big winners these days, but quality names in those arenas have long been locked down, unless you have big wallets.
I've sold 7 Cloud names this year. All private sales - end users in USA, Canada, and Western Europe, mainly Germany and Scandinavia. All dotcom. Mostly software and hosting companies rebranding themselves as cloud companies or adding cloud divisions.
I also get very nice offers on my premium app names, but these are mostly keepers, although I've sold a few this year. And have developed many of the app sites, with decent traffic and revenues.
Quality cloud names will continue to grow in value. As well as premium app names - as both arenas have exploded beyond early forecasts and expectations.
Apple got an amazing deal for icloud.com and 2 registered iCloud trademarks -- $4.5 million -- pocket change for such a domain and brand, which Apple is growing every day.
I've made some questionable domain investments over the last few years, but investing in cloud, app, and GEO names have been wise.