I guess, firstly lot's of people flat out don't want to vote anyone but the two main parties. Realistically, the Lib Dems are not going to get a majority, so anything the put forward is flawed. But democracy is a flawed construct to begin with, if you like their policies, then you might as well vote for them.What makes them different this time to the last time they had a sniff at power then bent over? That people just want a centrist party, even if it's one with no ideas and no bottle?
For what they did in power last time, they achieved quite a few of their policies.
http://news.bbc.co.uk/1/hi/uk_politics/election_2010/8619630.stm
Tax-free earning threshold to rise to £10,000, paid for by a "mansion tax" of 1% on properties worth over £2m applicable to value of property over that figure - Check
Annual savings totalling £15bn, including scrapping ID cards and not renewing the Trident nuclear deterrent - Check
Replace national curriculum with "minimum curriculum entitlement" in state-funded schools and scale back tests at age 11. More freedom for school management [England only] - Partial
Scrap compulsory retirement ages. State pension to rise in line with earnings, by 2.5% per year or in line with the Retail Price Index measure of inflation - whichever is highest - Check
Scrap compulsory retirement ages. State pension to rise in line with earnings, by 2.5% per year or in line with the Retail Price Index measure of inflation - whichever is highest - Check (And introduced some sort of State Pension for everyone)
etc
A lot of what was in their manifesto did get implemented, with the Tories taking credit. Obviously the heart breaking one for a lot of people was going back on tuition fee rises.