Obviously the one that you enjoy most,
but how do you find it?

The answer is to experiment methodically; and we would like to help. There are only 6 basic groups of tobacco mixtures, so it is quite practical to sample each type, and eliminate the flavours/tastes you don't like. Buy the Wesley Houseblend Sampler Pack covering these basic groups:
Nos. 1, 15, 24, 25, 41, 46, 43, 55, 58 (total of 110g of tobacco).
When you're trying any new tobacco, concentrate on the flavour. If you like the taste but it burns too hot, keeps going out, or everybody complains about the aroma, we can fix it. But if you don't like the flavour then it is no good going on with that tobacco. Some of the most satisfying blends have been made by just "throwing everything together" indiscriminately, but do make sure that you have tried each of the parts of the mixture on its own, otherwise if you don't like the blend you won't know which part you don't like.

SOME TOBACCO PROBLEMS

"Burns hot, giving a sore tongue" - this is usually due to the tobacco being smoked too fast, a very common problem. There are several possible reasons for this:
1. The tobacco is too weak. The smoker does not find it satisfying and smokes it too fast. If you haven't already done so, try a slightly stronger tobacco (Houseblends 24, 25, 41, 46, 43, 15, 52, all a little stronger than medium), or strengthen your existing blend with a plain, strong tobacco (Houseblends 8, 24 or 59).
2. Not enough flavour. The Dutch and some American type tobaccos, particularly, can be very bland. Test the English type tobaccos (Houseblends 13, 15, 55, 58) to see which kind of flavour you like, and add some to your "bland" tobacco if it is perfect in other respects; or change to the new flavour possibly adding some Houseblend 24, or 43 or 25 for aroma. Try No.46
3. You have difficulty keeping the pipe alight. Rub the tobacco out well, it will burn more easily; Or add a small amount of an easy burning blend (eg. No.24). If the tobacco is too wet, let it dry out a little. Read about "Wet Smoking".
4. You smoke too fast because you are anxious. Consciously slow down and relax. Smoking should be an extension of breathing, gentle and rhythmical.
5.  The tobacco is too alkaline. Neutralise this with a little Virginia tobacco (13, 15, 58) which is more acidic, or try No.43 or No.46 – which combine Burley and Virginia.5.     The tobacco is too alkaline. Neutralise this with a little Virginia tobacco (13, 15, 58) which is more acidic, or try No.43 or No.46 – which combine Burley and Virginia.

Other problems:

"Too strong " - makes you cough or feel dizzy. Try a lighter blend on its own, or mix some in with your "strong" tobacco (Houseblends 1, 13, 26, 43, 55).
"Smells unpleasant" - add a little aromatic tobacco, just enough to smell nice, but not so much that it affects the flavour. About 10% to 20% (Houseblends 23, 24, 25, 26, 43, 44, 46).
"Too bland" - not rich enough. Add the flavour you like. Try Nos. 15, 41, 46, 50, 55, 52, 58. (Read about Latakia and Perique tobaccos.)