Mine are,
1. Partner's in Crime (Too ridiculous for words, they were entering sitcom territory with that one).
2. New Earth (The whole thing about Cassandra hopping from body to body was too silly)
3. Dragonfire
4. Time and the Rani (would have been a whole lot better if it had been a Sixth Doctor story, with him Regenerating at the end)
5. The Leisure Hive (A poor start to John Nathan Turner's reign)
6. The Runaway Bride
7. Voyage of the Damned (The only good thing about it is seeing Kylie Minogue in a French Maids outfit).

8. Timelash (It has nothing to do with Colin Baker. It's the Poor Production and the low quality plot that makes it suffer)
9. Dimensions in Time (Jon, Tom, Peter, Colin and Sylvester are all on screen + a host of old companions going right back to the Hartnell era, this should be a classic but the Terrible story and Poor Script lets it down miserably, and it makes a complete mockery of it's lead stars).
10. Gridlock