Congratulations on at last completing your hermit hills base.
As for other games.. What is interesting about Minecraft videos is the stories you can create with it.. this is of course the draw of the game to all those addicted is molding the virtual world to tell and show your story, not the difficulty of the last cave that you found. Or puzzles on the way to the end.
When Minecraft youtubers go to other games its frequently more watching a lets play of the games story.. A very different thing.. and unless it has good commentary (and you are more than capable of that) less unique. Just something to keep in mind not to discourage you from playing other games of course.. and possibly reviewing or making a short lets play if you want to promote one. (And I personally am interested in good reviews/plays of Linux, ie steam machine compatible, games)
Regarding modded Minecraft, I feel there is too much focus on this highly over powered kitchen sink modpacks. Where the players are not even quite sure where one mod ends and another begins. Yet it looses the possibilities some of the more core mods provide stand alone. (such as only running say only Tinkers Construct) thus it be interesting to have vanilla like play but on a small mod pack with maybe only one core mod. (This isn't to say I'm not particularly impressed with both DMAC and Zueljin's Infinity server series are so it can be done, I just feel while there are many plays of maps, and packs, few focus on the mods themselves as the author(s) intended.. The other advantage to you is it minimizes the learning curve to get started)
Anyway regardless keep focus on the quality of your videos and the stories you tell with them, and you will have followers, Obviously those following you may evolve as the topics do.