I made the same decision as you - I've actually been voting as low as 10%, while I try to rebuild my voting power. It's nice to have the option to give a 100% vote when I really love a post, but for the most part its a lot more relaxed to give out lower value votes so I can support a wider range of posts.
Basically, I agree with your whole post. Spread the love!
10% is really low though. I might give 10% to some comments or if I've already started depleting my posts. Actually I'd love to give 50% and 100% more but it just depletes too quickly.
But it's still better than barely upvoting!
It's a tough balance, I just found my voting power was SO LOW when I gave out 30%+ plus. But I do agree that 10% upvotes can be pretty weak. Maybe it should be like tipping at a restaurant - 15-20% as the average :-)