Watch the Studying Other Players online guitar lesson by Jennifer Batten from Rock Sauce For Lead Guitar
The tools available today make it as easy as possible to learn other people's solos. There are plenty of apps available that allow you to slow music down to whatever speed you want, and loop anything from a few notes to a whole solo or more. Don't worry about becoming a clone of someone else, unless learning solos from only one guitarist year after year is all you ever do, and those lines become your entire vocabulary! All the greats were influenced by players that preceded them. Beck->Cliff Gallup, Eddie Van Halen->Eric Clapton, Robben Ford->Mike Bloomfield, Adrian Belew->Jimi Hendrix. Learn phrases and solos not only from other guitar players, but from other instruments, and singers as well. Other instruments can have a completely different approach. Ultimately whatever you learn and filter through your brain over time, will come out as you. You'll subconciously make choices to retain that which really resonates with you and the rest will fall by the wayside.