Lady Eruwaedhiel wrote:
When I finished my first novel I had a sequel already planned, since I let a couple of villains escape. Problem is, my planned perspective character A)isn't very talkative, B)is annoyingly sarcastic and cynical C)hates excitement. She isn't me. Or rather, she is me, but the darker side of me that I don't want to face. On the other hand, I have a third book planned from my favorite character's perspective and even though I have less ideas and structure for his story than for her story, I find myself wanting to skip the second book entirely and just write the third one.
I've experienced such problems with my story Alaidia/Peter's Angel.  Once it was an epically long work without a defined MC, then it became a trilogy, and now it's back to a standalone - but I'm only focusing on a chunk of the original plot, and I have a different MC.  It's one work I've had going for years, so I won't give up on it unless God calls me to - but I don't stress over it if I let it rest for a while.
My writing priorities change weekly, sometimes daily.  I go in obvious spurts with my longer works.  Short works I usually tend to finish promptly or not at all, and deadlines are one thing that will get me to ignore my own whims.  But on a general scale, I need variety.  It's just how I work.  I admire those that can stick solidly with one work for months.