I don't have any desire to retire early. Like druidh, I've made specific decisions about work, but mine have been to choose a career which I enjoy. Consequently I enjoy my job - the work is interesting, I'm constantly learning, and the people I work with are fun. So for me, going to work gives me mental stimulation and social enjoyment as well as an income. Sure, sometimes it's stressful, and I work long hours, but I also get 6 weeks annual leave plus bank holidays and TOIL, so I do have a fair bit of time off to travel etc (although my biggest problem is usually having too much work to do to be able to take all my leave).
I don't have a problem with working til I'm 67 / 68, given that the average lifespan has increased significantly, and I suspect that even after that I'd like to continue doing part-time research.
As for pensions, I do have one but I'm increasingly questioning if it's worth it, and whether it would be better to put the money into property instead.