I feel quite "lucky" that I don't think I've had a tick bite, I say "don't think" because I did have a couple of odd skin irritations in the past and after explaining them to friends they have said that if it was a tick I would know about it. I didn't really think they were common at all and it wasn't something I worried about until a friend/model mentioned to me that she had a got a tick bite on a shoot the previous day - 4 years ago … She was shooting in an area I've shot in countless times before. I've shot in sheep fields and in areas highly populated with deer and never had any issues. Perhaps ticks are like midges? they have a preference or can sniff out the blood/skin they desire more. I've only ever really had an issues with midges once on a shoot, they were pretty vicious and left me with pretty severe marks for days but most of the time when its midge seasons the photographer will be stood there with his camera in hand swearing at the little beasts swatting them away and I'm a few feet from him posing with no clothes on and getting no attention at all from the midges.
Could be: I'm O-Pos and bugs love me, but when my wife is around, she gets bitten to buggery and beyond and I get nothing. Canada was the worst: mossies like Heinkel bombers which can suck a man dry - or to the point of anemia in 24 hours. We used gallons of DEET over there: on our clothes, skin everywhere... then discovered it melts any watch faces not made of real crystal as well as the plastic furniture on military weapons systems...lol
Ticks - UK ticks are pretty easy to get off if you don't mind small scars - I take a pragmatic approach and dig them out ASAP then douse with alcohol or iodine. I have a fairly robust 1st Aid kit in the car - enough to treat knife and gunshots wounds as well as traumatic amputations - old habits etc.
I sunnier climes, the ticks are easier to spot - in Cyprus they're as big as your small finger nail and reminded me of the old thrupenny-bit coin. If they latch onto your head, you can actually hear them crunching their way in which is deeply unpleasant...I know...