Two weeks ago I made my first trip to Mull and ended up having a lot of lifers: Golden Eagle, White-tailed Eagle, Otter, Merganser, Black Guillemot, Slavonian Grebe, Eider, Velvet Scooter, Great Northern Diver, Shag, Pink-footed Goose, Great Skua, Icelandic Gull, Hooded Crow, (plus Common Gull and Rock Pippet; birds I thought I'd seen before but not confidently enough to tick when I started keeping a list)
And although strictly not a 'lifer', I also had my first decent watch of some hen harriers (twice watching pairs do a food exchange)