I'm mostly a doer, but for a while it unwittingly made me a pleaser.
Before I went back to college, the kind of people I worked with were all doers too, and we used to laugh about a game we had called "getting even". Every time one of us helped someone else in the group out, or did them a favor, the person getting the help would always reply in mock anger, "I'll get even with you for that!" Mostly because there was an ethos that you simply didn't take from others, so when you got some help, it was like a sword hanging over your head and you had to repay the "debt". It was mostly in good fun, but it was based on the premise that none of us were users or takers.
When I went back to school, I kept that same mentality, and would happily help out a classmate or in grad school, office mate. Not out of a need to be liked, but because I was used to an environment where it's just what you did, because later on, somebody would "get even with you" and help you out when you needed it. It took me a while to realize that all the stuff I did for other people was never reciprocated, because guess what -- all these people were takers and users. I don't think I ever went to a group lunch or dinner in college where, when paid with a single tab, the money on the table didn't EVERY DAMN TIME turn up short, and that's with me putting more in than I needed to.
I still run into this a lot in my current job, with the exception of only a few coworkers. I've learned my lesson though, and in most instances don't let myself be taken advantage of for being a nice guy (e.g., there's a spill in the coffee mess, but don't clean it up, because Ben will get sick of seeing it there and take care of it). I still end up sort of being taken advantage of when something important needs to be done and no one else steps up to do it. While i can let stuff that doesn't involve work being accomplished slide, it's really hard for me to step back and do nothing when I see something critical needing attention. Stupid German work ethic.
I choose my friends carefully, so I don't worry about any of them being users or takers or pleasers.