My page views peaked in November 2012 after quite a good year. There was a slight drop in page views in December, but overall earnings were up on November and it was my highest earnings month ever. There was a big drop in page views in January this year and an even bigger one in February. That trend has continued. Page views are now about half what they were in November 2012. Meanwhile, I just concentrate on adding content and try to make it content that is useful to the people who find my pages. I take note of search queries and add the content that people seem to want.
CTR has also been lower this year than it was last, however an increased average EPC has held things together. Yesterday was great for CTR, but EPC was about half of what it normally is. That's typical. Google is still deducting clicks regularly as well. Depending on how often I check, sometimes I see this and sometimes I don't. Earnings are there one minute and gone the next.
Ad targeting is appalling. I am seeing a lot of ads for Norwegian hotels and guesthouses (some in Norwegian) but my sites focus on Southeast Asia. I am also seeing ads for e-books about Peru and hotels in Brazil. None of these are IBA. I can tell the IBA ads because they appear just after I've been searching for something and I haven't been searching for anything related to these things.
May was a strange month last year. There were good days and bad days. So far this May I've had some good days, but also the worst day since ... last May.
After May last year I saw increases month on month until December, with one or two slight exceptions. I hope it is the same this year. I don't want to get back into the cycle of filtering out irrelevant ads because it's never-ending and ultimately doesn't seem to improve things much. I did this before but then just gave up and cleared out my filter list. I've also changed all my ad units to image and text. These things give G the freedom to serve the ads it thinks best without me restricting anything. I want G to manage the ad serving because Google should know best.
There are things I'm not satisfied with, but last year was my best year and this year's earnings are better than last year for the same January-May period.
I've been doing this now for seven years and occasionally come to read this forum. I've never experienced any consistency with Adsense. I've had some really good periods, but they are always punctuated with really bad ones. Adsense has always been the best way to monetise my site and it still is. Nothing else I've tried has come anywhere close. It's easy to grumble when it's not going well, but I'm still quite satisfied with it overall.