In my case: I never cared much for Angel or his crew to begin with, and only started watching this season's offerings because Spike had come into the mix, and Spike was the reason I'd watched BtVS previously. In recent months, I have enjoyed Angel for more than just the Spikey bits, though; and I did think the series had improved a lot...so: bye-bye Angel, thanks for a wonderful season, and hope to catch you on re-run soon.
As for Spike: I expect I'll not miss him too much, not as long as our talented fanfic writers carry on writing and publishing stories about him -- and with the demise of the series, there's no end to where their imagination may take us. I don't expect the fandom will peter out any time soon, and I'm sure I'll keep in touch with all the wonderful people I've met and connected with through my interest in two very enjoyable TV series over the last year and a half. I love you all.